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[ARCHIVED THREAD] - expected accuracy? (Page 1 of 2)
Posted: 12/11/2012 1:07:02 PM EDT
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I'm relatively new to AR's, though I have been an active hunter/shooter for over 40 years. I bought my first AR a couple weeks ago. Windham Weaponry SRC. I've put almost 200 rounds through it, 3 different kinds of ammo, Hornady, Remington and Tulammo (I know not to expect too much from the tulammo). Shooting from a bench, not free hand. 2 different scopes, same results.
at 25 yards, the ballistics charts all say around 3/4 inch low to have a 100 yard zero. Setting it at that, when I back up to 100 yards, I'm hitting 3-4 inches high, and not in a group at all. Note that the 25 yard groups of 3 shots are mostly cloverleafs. I typically shoot 3 shot groups, waiting at least 5 minutes in between groups for the barrel not to get too hot. So the best group at 100 yards, the POI are all within a baseball size circle. I did break each of three clay 'skeet' targets with one shot...... With my Winchester Model 70, .270 deer rifle, I can usually get clover leaf groups at 100 yards shooting from the bench. am I expecting too much for that kind of groups from my new toy? or could it just be I haven't found the ammo it likes yet? Today I just shot the hornady and the remington. Oh, all are 55 GR bullets with advertised velocity of 3240 at the muzzle. comments, ideas and suggestions from you experienced AR owners welcome! and thanks, in advance! Chaz |
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3 shot's is not a group.
Average AR accuracy is 3-4 MOA, or Baseball size or a little bigger. Shoot 10 shots aiming at the same point with out adjusting anything. Do that for each of the ammo you have. Try different weights 55grn, 69 grn ect. Some ammo, tulla, will not be capable of more than the 3-4 moa. other ammo is sub moa capable. |
| You didn't buy a precision AR so your five shot groups, depending on the ammo, can vary from below 1 inch to 3-4 inches. With lighter inexpensive ammo you'll likely be in the 2-4 inch range. OF course the shooter plays a big role in it. Finally, try a lot of different ammo brands and bullet weights... rifles can be picky about what they like. They'll all shoot, but some will just work better with a particular barrel. |
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thanks sir. so the 'don't shoot over 3 shots at time' isn't right? and from what you're saying, if i'm shooting 10 shot groups that in a baseball sized circle, I should be happy with that? I wouldn't ever be satisfied with that out my deer rifle.....LOL I will be doing some hunting with it, and the kill zone is a bit bigger than baseball size, so I guess all is good!
and yes I already know my next ammo purchase is going to be more of a hunting bullet, something at least 62 GR. The twist on this rifle is 1/9, and everything I've read is that's not real conducive for bullets much heavier than 62 grain, although I do know each rifle is different. thanks again! |
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A 1/9 will shoot 69gr just fine.
Once again, you didn't buy a precision rifle but with more time behind the trigger you'll tighten up those groups. I mainly shoot 62gr cheap ammo and range between 1-2 inch five shot groups. With heavier bullets I've shot below MOA with both a chrome lined and melonite treated barrel. Not every time but have done it, point being with better rounds I cut my 5 shot groups in half. When I was first playing around with it I was shooting steel cased stuff and the groups were like what you are saying. Let me emphasis a point again... Your rifle's barrel will like some brands of ammo and weights better. If I were in your boots I'd go buy 10 different boxes of 69gr ammo and figure out which shoots the best. Then practice with that ammo. Another thing is get a good trigger, yes they can make a HUGE difference. I put Geissele SSA's on all my rifles. Outstanding triggers. |
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Chaz, you are asking a lot of questions, and telling us a lot, whether you know it or not.
1. Is your rifle free floated? It helps a bit if it is. 2. What barrel profile? An HBar will usually give you a bit more accuracy. 3. Which ammo from the three companies did you shoot? 4, DO NOT, repeat DO NOT, believe that each and every shooter on this site, gets MOA out of any rack grade gun they buy. 5. Get yourself a good trigger. That will probably shrink your groups more than any other single thing. 6. Probably not best to compare it to your deer rifle, that obviously shoots well. What twist rate is your barrel? Thinking it's probably a 1/9, go get yourself some 68 gr. Black hills, or some 69 gr. Black hills. Those are Hornady and Sierra bullets repectively. You may also try out some Hornady V-Max bullets. These 3 bullets will generally shoot well in most guns. Most rack grade guns, with nothing special ammo, will generally give you around 3 - 5 moa results. You've said that you are a new AR owner. It is a different gun. Give yourself a little time to get used to it. Just enjoy the ride, L2 Edit: Lion beat me by a couple of minutes on a few points. |
| Sit down with your .270 & try shooting a 10-shot group too. I was always taught the '3-shot group' method & can put down some impressive 3-shot groups with my hunting rifle. Once you start shooting more shots though, you'll see it open up. Search for posts by Molon - he explains it better than pretty much anybody else can. |
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thanks sir. so the 'don't shoot over 3 shots at time' isn't right? and from what you're saying, if i'm shooting 10 shot groups that in a baseball sized circle, I should be happy with that? I wouldn't ever be satisfied with that out my deer rifle.....LOL I will be doing some hunting with it, and the kill zone is a bit bigger than baseball size, so I guess all is good! and yes I already know my next ammo purchase is going to be more of a hunting bullet, something at least 62 GR. The twist on this rifle is 1/9, and everything I've read is that's not real conducive for bullets much heavier than 62 grain, although I do know each rifle is different. thanks again! Regarding the part I highlights. It's an AR, shoot it |
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thanks everyone, really! I have been doing nothing but reading since I posted this, and have learned some things. I will openly admit that I know I'm not the smartest fellar in the world, but I do try to study things out and ask questions. I'd much rather trust the experience of other like minded people on a forum than just plain and simple the adivertising that I see.
first off, yes, I realize that I bought an 'off the rack', inexpensive rifle. yes it most likely needs a trigger job done on it, although with close to a couple hundred rounds I am getting the feel for it more each shot. Yes I need to spend more time behind it. I do intend to do some hunting with it, mostly varmint type of hunting, which is why I was hoping/expecting tighter groups. I have read and even made myself notes from some of your posts, and have definitely come to realize that I won't get the same type groups with this short barrelled semi auto as I am used to getting with my heavy barrelled bolt action deer rifle, but I am totally happy with that, esp after reading my 3-4 MOA groups are pretty close to average. I know after I've shot it more and become more comfortable with and more used to it, I will improve it some. Don't get me wrong, I love this thing! man it's fun, yes I do intend on getting some heavier ammo, and next time i go out, I'll take the .270 and shoot some 10 shot groups and see for myself that you are indeed correct (though I really don't have to take it, I know you're right) I am on a fixed income, so buying up a bunch of ammo at a time is kind of hard, but I can see where this thing is gonna be a lot of fun! I will indeed pick up some different brand heavier ammo for the next trip out, but the cheaper 55 grain stuff is just as fun to shoot! thanks everyone for the insights, I do very much appreciate it! |
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@ theLion - i already know i like you, LOL i plan on shooting this as much as possible. I am disabled and not able to get out a lot, but sometimes I just have to bite the bullet, knowing I'll pay the price in the pain level, and get out and do some things.
thanks again for the input! |
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Good discussion.
3-shot groups are very useful for a whole lot of purposes and we use them all the time; checking zero, rough zeroing, even zeroing of rifles that have a proven past POI and grouping ability. But flukes can pop up and either give you a negative or overly positive picture of your rifle's grouping ability and thus skew your ideas on how the gun shoots.. Oops...how the gun AND shooter shoots! Your groups will open up with 10-shot groups but they will give you a more predictable idea of the rifle's capabilities. Having said that, so will multiple 3-shot groups. In fact...quite helpful is 3 3-shot groups plus a one shot group fired at the same target. Finally, I have a pet peeve about HOW groups are reported. "My rifle shoots 1 inch groups" is a meaningless statement. Using the term "group" demands additional information or it is a valueless description; Range shot and number of shots fired in the group are essential in making sense out of the word "group". The "one-shot group" is a very useful "group" for hunting training. Head to the range and before you start shooting, go to your position and on a clean target fire one shot. Record it or save the target. Repeat every time to go to the range. That "group" is very helpful in telling you how good a shot you are for hunting purposes. |
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Good discussion. 3-shot groups are very useful for a whole lot of purposes and we use them all the time; checking zero, rough zeroing, even zeroing of rifles that have a proven past POI and grouping ability. But flukes can pop up and either give you a negative or overly positive picture of your rifle's grouping ability and thus skew your ideas on how the gun shoots.. Oops...how the gun AND shooter shoots! Your groups will open up with 10-shot groups but they will give you a more predictable idea of the rifle's capabilities. Having said that, so will multiple 3-shot groups. In fact...quite helpful is 3 3-shot groups plus a one shot group fired at the same target. Finally, I have a pet peeve about HOW groups are reported. "My rifle shoots 1 inch groups" is a meaningless statement. Using the term "group" demands additional information or it is a valueless description; Range shot and number of shots fired in the group are essential in making sense out of the word "group". The "one-shot group" is a very useful "group" for hunting training. thanks for the input! I was indeed shooting multipe 3 shot groups, at different targets or sections of the targets. all were similar in POI, so I'm reading now I should be happy with this. Next time out I am going to do several 5 and 10 shot groups. Not sure since I'm not a paid member if I can post pics, but I'll get some of the next time out and see if I can. Thanks all for the input Head to the range and before you start shooting, go to your position and on a clean target fire one shot. Record it or save the target. Repeat every time to go to the range. That "group" is very helpful in telling you how good a shot you are for hunting purposes. |
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Welcome!
Molon's "The Trouble With 3-Shot Groups" post, and a link to his collected posts from the ammo forum. Some seriously well-thought-out material and good reading on ammo & accuracy. |
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thanks everyone, really! I have been doing nothing but reading since I posted this, and have learned some things. I will openly admit that I know I'm not the smartest fellar in the world, but I do try to study things out and ask questions. I'd much rather trust the experience of other like minded people on a forum than just plain and simple the adivertising that I see. first off, yes, I realize that I bought an 'off the rack', inexpensive rifle. yes it most likely needs a trigger job done on it, although with close to a couple hundred rounds I am getting the feel for it more each shot. Yes I need to spend more time behind it. I do intend to do some hunting with it, mostly varmint type of hunting, which is why I was hoping/expecting tighter groups. I have read and even made myself notes from some of your posts, and have definitely come to realize that I won't get the same type groups with this short barrelled semi auto as I am used to getting with my heavy barrelled bolt action deer rifle, but I am totally happy with that, esp after reading my 3-4 MOA groups are pretty close to average. I know after I've shot it more and become more comfortable with and more used to it, I will improve it some. Don't get me wrong, I love this thing! man it's fun, yes I do intend on getting some heavier ammo, and next time i go out, I'll take the .270 and shoot some 10 shot groups and see for myself that you are indeed correct (though I really don't have to take it, I know you're right) I am on a fixed income, so buying up a bunch of ammo at a time is kind of hard, but I can see where this thing is gonna be a lot of fun! I will indeed pick up some different brand heavier ammo for the next trip out, but the cheaper 55 grain stuff is just as fun to shoot! thanks everyone for the insights, I do very much appreciate it! Someone correct me if I am wrong but a trigger job on an AR means buying and installing a different trigger group instead of having a smith smooth it up. When I built mine I bought a lower parts kit with an RRA match trigger which cost about another $100. It has worked very well for me. There are more exotic and expensive trigger group replacements but I have found no reason to go there. According to what I have read on this forum the original trigger is more reliable than the upgrades but mine has been fine through a lot of rounds. |
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Lot's of good points. By coincidence myself and a few others were touching on this subject too in another thread. At first it started as a comparison of a couple of middy rifles and what to expect with commonly used cheap ammo. Couple others (EVR and Finslayer) have been kind enough to post some of their results too. EVR just recently added his fine contribution to the mix. I plan on adding more updates with some different rifles and ammo. I hope others will add to it too just for the value of discussion and informal data comparison.
But to answer your question, yes that is totally normal AR accuracy for a unimproved rack grade AR. That said, it doesn't take much to make significant improvements. Decent ammo and a trigger upgrade can do wonders. Grab a box of Black Hills 60gr. VMax or some of the others mentioned and you will likely be pleasantly surprised. Even with your stock trigger. Lots of variables come into play. Here is a link to that thread. Accuracy Thread It's still in its early stages. Feel free to add to it. Don't worry if your contribution is less than stellar. Mine wasn't. lol! The goal isn't to critique but just compare. |
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Ammo is THE variable... Short of being a poor shooter ammo will make the biggest difference of anything you will do to your rifle. On a rack grade AR finding a load it likes will be the difference between 1 MOA (about the best you'll get from a chrome lined Mil-Spec gun on a good day) and 3-4 MOA.
Also... Did I miss what kind of optic you are using? Shooting 2-3 MOA groups with iron sighs is (IMO) outstanding. I'm a decent shooter with a fair amount of AR iron experience; Last weekend I re-zero'd my RRA stainless middy with a carry handle and .052" front sight post. With AE 55grn FMJ I shot a 2.5" group at 100 yards. It was better than I expected. |
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Ammo is THE variable... Short of being a poor shooter ammo will make the biggest difference of anything you will do to your rifle. On a rack grade AR finding a load it likes will be the difference between 1 MOA (about the best you'll get from a chrome lined Mil-Spec gun on a good day) and 3-4 MOA. Also... Did I miss what kind of optic you are using? Shooting 2-3 MOA groups with iron sighs is (IMO) outstanding. I'm a decent shooter with a fair amount of AR iron experience; Last weekend I re-zero'd my RRA stainless middy with a carry handle and .052" front sight post. With AE 55grn FMJ I shot a 2.5" group at 100 yards. It was better than I expected. YES! You boy's will have to belly up to a reloading press! or buy premium ammo. Buy'n ammo then ya gota figure what your rifle likes! bullet wise,primer,powder. I can get a cheap barrel to shoot handloads, better than most will get a high $$$ end barrel to shoot with crap ball ammo! That's just the way it is, plain and simple! gota buy a decent bullet if ya reload! settin up to reload and spendin all that brass prep time. then buy'n a shit cheapo 55 gr. open base bullet ain't gonna do a thing for you! buy ya a quality bullet, Sierra, 52,69, Berger's ect...................then you'll see what your wanting to see.! |
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Lot's of good points. By coincidence myself and a few others were touching on this subject too in another thread. At first it started as a comparison of a couple of middy rifles and what to expect with commonly used cheap ammo. Couple others (EVR and Finslayer) have been kind enough to post some of their results too. EVR just recently added his fine contribution to the mix. I plan on adding more updates with some different rifles and ammo. I hope others will add to it too just for the value of discussion and informal data comparison. But to answer your question, yes that is totally normal AR accuracy for a unimproved rack grade AR. That said, it doesn't take much to make significant improvements. Decent ammo and a trigger upgrade can do wonders. Grab a box of Black Hills 60gr. VMax or some of the others mentioned and you will likely be pleasantly surprised. Even with your stock trigger. Lots of variables come into play. Here is a link to that thread. Accuracy Thread It's still in its early stages. Feel free to add to it. Don't worry if your contribution is less than stellar. Mine wasn't. lol! The goal isn't to critique but just compare. thanks for the post! I will definitely be looking at y'all's thread. I do appreciate the comments. I've come to realize after all the great help here, that what I am getting is pretty much considered 'the norm' for the off the rack rifle and the cheaper ammo. I have read through the suggested "molon" threads, and found them very informative. I have realized that I need to shoot larger groups. To whomever asked about the sights, no I'm not shooting iron sights, I also bought some Winchester Razorback 64 grain ammo today. This is more along the lines of the type ammo I'd consider for hunting anyway. If i'm just gonna be out shooting at apples or grapefruits or clay circles, the cheap stuff shooting baseball sized groups will be sufficient. Thanks everyone for the help. I haven't been around here long, but I am enjoying most of what I am finding here! Will post up the results of shooting the heavier ammo when I get a chance to get out and run some through! |
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Kind of silly but are you resting the barrel directly on a sandbag or something? This can cause the shots to go very high. ok i've never heard this, anyone else verify that resting the barrel on something makes you shoot high? for the record, I have a cheap bench vise I've used for years for zeroing in my hunting rifles, and no I wasn't locking the barrel in the vise, only the handguard |
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Kind of silly but are you resting the barrel directly on a sandbag or something? This can cause the shots to go very high. ok i've never heard this, anyone else verify that resting the barrel on something makes you shoot high? for the record, I have a cheap bench vise I've used for years for zeroing in my hunting rifles, and no I wasn't locking the barrel in the vise, only the handguard I don't know about shooting high, but it would certainly have an effect on barrel harmonics. I'd just avoid it. |
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Parallax can cause problems when zeroing a rifle at 25y especially, with the typical AR stock. Speaking of which, if your stock is relatively loose on the receiver extension that won't help your groups either as the gun tends to recoil a bit different each time.
IMHO, 2 moa should be possible using decent ( i.e. PMC Bronze) ammo and a magnified optic from the bench. YMMV |
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Ok all, thanks for the continued input!
As I wrote last night, I bought some winchester razorback 64 GR ammo. So today, I got out and just did some more shooting. I have found that old saying that some rifles just don't like some ammo to be very true. I had been doing some shooting with the Remington UMC 55 GR FMJ ammo. This is what I've gotten the absolute WORST groups period, so having finally used it all, I won't be buying any more of it. Heck even the cheap tulammo shoots better for me than that stuff. I finished up the UMC stuff, then got out the box of Hornady 55 GR SP's I had left. Ok, those left me feeling much more satisfied, and after running out of those, I shot some of the 64 GR winchester. I am much more satisified shooting these two choices. going to try to put a picture up, but here's basically the explanation. Shooting 5 shot groups instead of 3, I know, 10 shots are what's recommended, but I was going to take into consideration the whole target at the end of it all anyway...... first off the target with the last 3 groups of 5. All shots on the target. There are some other shots you'll see outside the black, I stuck this self adhesive target on top of the other target I was shooting on. so here it is, all 15 shots in the black, which would be more than sufficient for shooting at the kill zone on a deer. So that much at least was a good thing: http://i.imgur.com/LF89X.jpg now the break down: in the red, the first 5 shots. Love this splattering target, easy to see even at 100 yards which shot was which! notice one WTH???? shot, that was the last shot in the group. After this group, I adjusted the scope zero to raise the POI, and the yellow group is after that, note another WTH?? shot, I have no clue on either of these shots, usually when I pull off, I pull off to the right. Last group is after once again making small adjustments to move POI both up and over. I did intentionally set it to hit a bit left, since I typically pull right. The first 3 shots were the last of the hornady cartridges, the two cloverleafed are the two 64 GR cartridges, in keeping with the 5 shot groups, I had put those two in the mag to be the last two shots. again with another, not quite as extreme WTH shot off to the right, the first in the group. the last 4 were within 1 1/2" inch, with the two heavier bullets cloverleaf! needless to say, I am more than satisified with grouping now. And I do know not to buy the UMC ammo for this rifle, and my plinking ammo can still be the tulammo....it was getting dark, so I had to call it. Next time out I'm going to definitely do some 10 shot groups. here it is: http://i.imgur.com/9mblm.jpg the winchester ballistics calculater says for 150 yard zero, to be .7 high at 100 yards. Our shooting area on our hunting lease gives us this 100 yard shot, but nothing longer, it's just easier to match the ballistics at 100 yards. I want to shoot some 10 shot groups before I try to adjust the scope any more to move the POI |
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pretty good!!!!
I've never shot a 7.62. The guy who neighbors our hunting lease has a closet full of AK's and SKS he's always out playing with. I stopped and talked to him this evening, if I get to go over this weekend, I told him I'd call him first and we can go shoot some. Going to shoot some ten shot groups before I make any more scope adjustments, I have enough confidence after today to actually hunt with this now. Might take it in the morning.... next time out, I also intend on doing some offhand shooting at 50 yards, the first time out with my son in law, we did some offhad shooting at some clays, I was around 75 to 80% with the 3 power scope on it, I know with the variable I can bump it up to around 5 power and raise that percentage some, and as someone here pointed out, more time behind it will help as well. |
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I dont know if this has been posted, but 3/4 inch low at 25 yards with.223/5.56 is closer to a 50 yard zero not a 100. I also believe if you want a 100 yard zero you should be like 1inch high at 25 yards. Someone can correct me if i am wrong. I believe that is incorrect. An inch high at 25 will be between 7'' and 10'' high at 100. An inch low at 50, give or take, will give you a 100 yard zero. There are crap loads of different zeros. Look up "Travis Haley-zero" on youtube. He goes over about most all of them. It is pretty informative. As always, I am a huge fan, of getting all of your own dope. My primary gun, I have 3 different rounds that shoot the same poa/poi. I have it zeroed at 100. I also have dope on it at 25, 50, 200, and 300. I keep a logbook, that would be similar to a snipers logbook. I have round counts, deep cleanings, zeroes, dope, cold bore shots, and weather conditions when shooting. Is it all neccesary? I don't know, but it makes me think that I am being more thorough, and I feel like I miss less, when I am killing stuff with it. Chaz, I also will go out and shoot 3 shot groups, 5 shot groups, 10 shot groups, and even 20's a times. Sometimes, I put up a clean target, and see if I can put it all together, and hit dead center, with one kill shot, lol. When you run yourself against a few different drills like this, you are testing 3 things. The gun, the ammo, and you. I love it when a guy comes on here talking about his "moa gun, with a "called" flyer". Yeah, I know when I crap the bed on a shot. If that's the case, it's not moa, now is it? Just switch it up, once you get comfy, and it will make you a better shooter. Truth be told, I enjoy it all. Good luck again Chaz, L2 |
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I dont know if this has been posted, but 3/4 inch low at 25 yards with.223/5.56 is closer to a 50 yard zero not a 100. I also believe if you want a 100 yard zero you should be like 1inch high at 25 yards. Someone can correct me if i am wrong. I believe that is incorrect. An inch high at 25 will be between 7'' and 10'' high at 100. An inch low at 50, give or take, will give you a 100 yard zero. There are crap loads of different zeros. Look up "Travis Haley-zero" on youtube. He goes over about most all of them. It is pretty informative. As always, I am a huge fan, of getting all of your own dope. My primary gun, I have 3 different rounds that shoot the same poa/poi. I have it zeroed at 100. I also have dope on it at 25, 50, 200, and 300. I keep a logbook, that would be similar to a snipers logbook. I have round counts, deep cleanings, zeroes, dope, cold bore shots, and weather conditions when shooting. Is it all neccesary? I don't know, but it makes me think that I am being more thorough, and I feel like I miss less, when I am killing stuff with it. Chaz, I also will go out and shoot 3 shot groups, 5 shot groups, 10 shot groups, and even 20's a times. Sometimes, I put up a clean target, and see if I can put it all together, and hit dead center, with one kill shot, lol. When you run yourself against a few different drills like this, you are testing 3 things. The gun, the ammo, and you. I love it when a guy comes on here talking about his "moa gun, with a "called" flyer". Yeah, I know when I crap the bed on a shot. If that's the case, it's not moa, now is it? Just switch it up, once you get comfy, and it will make you a better shooter. Truth be told, I enjoy it all. Good luck again Chaz, L2 Thanks I had a feeling the my 1inch high was off for a 100 yard zero. |
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I dont know if this has been posted, but 3/4 inch low at 25 yards with.223/5.56 is closer to a 50 yard zero not a 100. I also believe if you want a 100 yard zero you should be like 1inch high at 25 yards. Someone can correct me if i am wrong. I believe that is incorrect. An inch high at 25 will be between 7'' and 10'' high at 100. An inch low at 50, give or take, will give you a 100 yard zero. There are crap loads of different zeros. Look up "Travis Haley-zero" on youtube. He goes over about most all of them. It is pretty informative. As always, I am a huge fan, of getting all of your own dope. My primary gun, I have 3 different rounds that shoot the same poa/poi. I have it zeroed at 100. I also have dope on it at 25, 50, 200, and 300. I keep a logbook, that would be similar to a snipers logbook. I have round counts, deep cleanings, zeroes, dope, cold bore shots, and weather conditions when shooting. Is it all neccesary? I don't know, but it makes me think that I am being more thorough, and I feel like I miss less, when I am killing stuff with it. Chaz, I also will go out and shoot 3 shot groups, 5 shot groups, 10 shot groups, and even 20's a times. Sometimes, I put up a clean target, and see if I can put it all together, and hit dead center, with one kill shot, lol. When you run yourself against a few different drills like this, you are testing 3 things. The gun, the ammo, and you. I love it when a guy comes on here talking about his "moa gun, with a "called" flyer". Yeah, I know when I crap the bed on a shot. If that's the case, it's not moa, now is it? Just switch it up, once you get comfy, and it will make you a better shooter. Truth be told, I enjoy it all. Good luck again Chaz, L2 Thanks I had a feeling the my 1inch high was off for a 100 yard zero. Jukebox, I was going straight off the winchester ballistics calculator right online here http://ballisticscalculator.winchester.com/ it tells me a 55 GR FMJ at 3240 muzzle should hit .8 low at 25 yards. Actually I downloaded the Remington Shoot! calculator and it says set it .62 low at 25 yards. I am definintely going to buy some more hornady ammo, and I may pick up some of the V-max (or the Z-max which is basically the same but cheaper) and play around with some of that as well. |
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Some ramblings on the Close Range Zero.
I really do not like the whole "Zero at 25" thing. It is a mass-production GI-military mentality solution to a technical challenge and it is only partly effective. Short range zero's do NOT always produce the goods at longer ranges. They must be shot PERFECTLY. If shot perfectly and fed all the correct data, mathematically and geometrically they are "accurate", but their accuracy lies in the realm of the possible, not always actual...and it is the actual that counts. Remember, ANY miscalculation of data or introduction of shooter error creates an error that grows grows as actual distance to the target grows. It is easy to discount slight variations in POI at 25 meters and then interpolate to 300 based on the chronograph, the BC and the height of sights. Except...all too often, when the load is actually shot at the farther ranges, it is OFF. It is actually pretty easy to miss the actual POI when shooting at the close ranges. Often shooters take a "this looks really good" attitude about, say, a 3/4 inch group at 25 meters. Well, at 100 that is 3 inches and a 3/4 inch windage variation is a MECHANICAL ACCURACY variation of 9 inches at 300. And that is assuming ALL the data is absolutely correct. Feeding a bunch of "good enoughs" into short range zeroing can produce 200 and 300 meter impacts far from "center". I suspect fewer and fewer people have access to ranges where distances of over 200 can be shot, and that is likely the reason for all the close-range zeroing, and also, fewer and fewer people hunt, so there is no "proof in the pudding" needed. As for hunting, in my opinion, for any valuable game, it is unethical and just plain stupid to zero at 25 and then go ahead and trust that zero to shots at 200, 250, 300, etc. Yet again, it was proven to me yesterday when I set up a spare scope on my M&P. I should have shot a picture of the close range group to demonstrate all this. I'm certain many might have totally missed the slight right windage of the close range group. For myself, I didn't care, as I was heading out farther to zero at 200. I just wanted it to be close enough. But for those stuck with an indoor range, or otherwise "satisfied" with a short range zero for longer range shooting, the results might have been accepted at 25, with the poor 200 unknown unless an actual shot was taken at that range. |
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Jukebox, I was going straight off the winchester ballistics calculator right online here http://ballisticscalculator.winchester.com/ it tells me a 55 GR FMJ at 3240 muzzle should hit .8 low at 25 yards. Actually I downloaded the Remington Shoot! calculator and it says set it .62 low at 25 yards. I am definintely going to buy some more hornady ammo, and I may pick up some of the V-max (or the Z-max which is basically the same but cheaper) and play around with some of that as well. Chaz, be careful of those super informative shortcuts. They are not always as accurate as you might hope they are. At least not in my experience. At least not withour coming up with a bunch of your own numbers, and plugging your own data in. A lot of ammo "ballistics" come from a 24'' barrel. Then you have your enviromentals to contend with. Things like temp., wind, and barometric pressure. All of these are going to affect your shots, to some degree. Im not saying that they are worthless, I'm just saying to be careful. I just didn't want you going out there, your dope that you scored on the net being off, and then you're really confused and frustrated, as to why nothing you dial goes where it's supposed to.. Always trust, but verify. Take care, L2 |
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Basically, all the loads shot in my last post on the following thread would be easy to call "good enough on" at short range. Take those out another 100 meters and the ones not actually ON will continue to drift away from the desired POI.
http://www.ar15.com/forums/t_3_118/592264_Spikes__PSA__and_others__Accuracy_Tests_.html&page=2 |
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Quoted:
Jukebox, I was going straight off the winchester ballistics calculator right online here http://ballisticscalculator.winchester.com/ it tells me a 55 GR FMJ at 3240 muzzle should hit .8 low at 25 yards. Actually I downloaded the Remington Shoot! calculator and it says set it .62 low at 25 yards. I am definintely going to buy some more hornady ammo, and I may pick up some of the V-max (or the Z-max which is basically the same but cheaper) and play around with some of that as well. Chaz, be careful of those super informative shortcuts. They are not always as accurate as you might hope they are. At least not in my experience. At least not withour coming up with a bunch of your own numbers, and plugging your own data in. A lot of ammo "ballistics" come from a 24'' barrel. Then you have your enviromentals to contend with. Things like temp., wind, and barometric pressure. All of these are going to affect your shots, to some degree. Im not saying that they are worthless, I'm just saying to be careful. I just didn't want you going out there, your dope that you scored on the net being off, and then you're really confused and frustrated, as to why nothing you dial goes where it's supposed to.. Always trust, but verify. Take care, L2 totally agree with this, and realize please that I was shooting a newly mounted scope. Never did trust the bore sighting that much, and really wanted to make sure I was just hitting the target, and if so where was it going to be. THEN I backed up to the 100 yard mark to shoot. I'd never trust shooting at 25 yards, going off a ballistics chart and trusting it to go hunt with. If anything, I'll shoot up every cartridge I have "just to be sure" and then have to go buy more before I can hunt |
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Some ramblings on the Close Range Zero. I really do not like the whole "Zero at 25" thing. It is a mass-production GI-military mentality solution to a technical challenge and it is only partly effective. Short range zero's do NOT always produce the goods at longer ranges. They must be shot PERFECTLY. If shot perfectly and fed all the correct data, mathematically and geometrically they are "accurate", but their accuracy lies in the realm of the possible, not always actual...and it is the actual that counts. Remember, ANY miscalculation of data or introduction of shooter error creates an error that grows grows as actual distance to the target grows. It is easy to discount slight variations in POI at 25 meters and then interpolate to 300 based on the chronograph, the BC and the height of sights. Except...all too often, when the load is actually shot at the farther ranges, it is OFF. It is actually pretty easy to miss the actual POI when shooting at the close ranges. Often shooters take a "this looks really good" attitude about, say, a 3/4 inch group at 25 meters. Well, at 100 that is 3 inches and a 3/4 inch windage variation is a MECHANICAL ACCURACY variation of 9 inches at 300. And that is assuming ALL the data is absolutely correct. Feeding a bunch of "good enoughs" into short range zeroing can produce 200 and 300 meter impacts far from "center". I suspect fewer and fewer people have access to ranges where distances of over 200 can be shot, and that is likely the reason for all the close-range zeroing, and also, fewer and fewer people hunt, so there is no "proof in the pudding" needed. As for hunting, in my opinion, for any valuable game, it is unethical and just plain stupid to zero at 25 and then go ahead and trust that zero to shots at 200, 250, 300, etc. Yet again, it was proven to me yesterday when I set up a spare scope on my M&P. I should have shot a picture of the close range group to demonstrate all this. I'm certain many might have totally missed the slight right windage of the close range group. For myself, I didn't care, as I was heading out farther to zero at 200. I just wanted it to be close enough. But for those stuck with an indoor range, or otherwise "satisfied" with a short range zero for longer range shooting, the results might have been accepted at 25, with the poor 200 unknown unless an actual shot was taken at that range. Also in total agreement with this. I'd never trust shooting short range with ANY of my rifles to be good enough to hunt with. I basically just use the short ranges to make sure I'm at least just hitting the target, thanks for the input! |
| I can tell you that from being an avid long gun shooter and hunter that the triggers on these AR's are pretty bad when you are shooting for precision accuracy, but if a guy figures his trigger out he can still shoot it quite well. I put a scope on my new Colt LE6920 and went to the range yesterday and sighted it in for a 50/200 yard zero and I gotta say I must have got a good one. My targets shooting both Hornday 55 grain SP's and the Fusion 62 grainers looked like those little star paper targets at the fair that you shoot with an auto bb gun. Goups were well under MOA at 50 yards and really way better than I ever expected. All I read on these forums is that 2-3" MOA is expected and thats not something a guy like me is willing to accept. But my new AR has really impressed the chit out of me and i expect to kill a deer with it this weekend. I definately intend to put a better trigger in this thing and honestly believe it will make my groups even tighter, these rifles dont weigh much and with heavy creepy triggers you really have know how to counter it or youll move the gun enough off your aiming point while squeezing the trigger . |
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I can tell you that from being an avid long gun shooter and hunter that the triggers on these AR's are pretty bad when you are shooting for precision accuracy, but if a guy figures his trigger out he can still shoot it quite well. I put a scope on my new Colt LE6920 and went to the range yesterday and sighted it in for a 50/200 yard zero and I gotta say I must have got a good one. My targets shooting both Hornday 55 grain SP's and the Fusion 62 grainers looked like those little star paper targets at the fair that you shoot with an auto bb gun. Goups were well under MOA at 50 yards and really way better than I ever expected. All I read on these forums is that 2-3" MOA is expected and thats not something a guy like me is willing to accept. But my new AR has really impressed the chit out of me and i expect to kill a deer with it this weekend. I definately intend to put a better trigger in this thing and honestly believe it will make my groups even tighter, these rifles dont weigh much and with heavy creepy triggers you really have know how to counter it or youll move the gun enough off your aiming point while squeezing the trigger . speaking of triggers, I'm ok with this one for now, basically because of money issues on a fixed income, LOL so I'll make do. BUT....at some point I would like to either have this one worked on, or replaced. Are there adjustments on these? or just flat out have to be changed out? if so, some options/ideas from you experienced guys please! the gunsmith at Adventure Outdoors in Marietta GA not too awful far from me advertises trigger jobs for $75. I'll have to ask next time I go in what all that would do for me. They also have an indoor range......maybe I need to scrape up some cash and go visit them soon |
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speaking of triggers, I'm ok with this one for now, basically because of money issues on a fixed income, LOL so I'll make do. BUT....at some point I would like to either have this one worked on, or replaced. Are there adjustments on these? or just flat out have to be changed out? if so, some options/ideas from you experienced guys please! the gunsmith at Adventure Outdoors in Marietta GA not too awful far from me advertises trigger jobs for $75. I'll have to ask next time I go in what all that would do for me. They also have an indoor range......maybe I need to scrape up some cash and go visit them soon That will not be anywhere near as good as just buying a good quality aftermarket trigger... (I had a good gunsmith do a Colt trigger for me - Not nearly as good as my aftermarket adjustable triggers are...) Save your money and buy a good adjustable trigger. IF you happen to have a flattop upper - Mount your scope as close to the barrel as possible - Less issues with parallax this way. You 'could' send that barrel out and have it cryo treated if the stringing as it heats up is really bothering you. (not worth it on a cheap ass barrel IMO) My 'good' barrels are all SS, Heavy and Cryo treated.The stringing on those barrels is noticably less than what I would expect to see from a regular type barrel. Many of the top barrel makers already do this to their match grade barrels... A Cryo treated barrel also tends to stay cleaner (less fouling). I have gone to the range many times and shot both treated and untreated barrels using the same ammo and approx the same number of rounds each and noticed a big difference in the number of patches it takes to get each one clean afterwards. Faster is not always = to more accurate when it comes to ammo... If you ever get aroung to reloading you will quickly find that it is not hard to load VERY accurate ammo for YOUR PARTICULAR rifle. Just because a particular bullet shoots accurately in one rifle doen NOT mean that it will do so in another rifle that is 'similar'. All barrels will have their own sweet spot when it comes to the barrel harmonics and the load / rounds fired. Reloading gives you the ability to 'tune' your particular bullet choice for the best possible accuracy that you can get from it out of your particular barrel. |
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Let me share my example.
My S&W upper & lower + Bushmaster HBAR 20" 556 1/9 assembly gives constantly average 2.41 MOA 10 shot groups with handloaded Nosler CC 69gr bullet. Vortex 1-4 x 24 Viper PST, non-free floating handguards (Magpul MOE), no bipod, no rest under the stock. Jard two-stage 4 lbs trigger. Surpasses the 3-4 moa standard. Not the most accurate and tack-driving combination, but super-reliable, which I value the most!
EDIT: 2.41 MOA average extreme spread of the groups. |
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Forget the ammo its is in your head see the round hit the spot before you pull the trigger belive and .125 MOA will happen with shit ammo its is you only. I've seen bench rest rifles and ammom hit 6 inch at 1000y anf a sniper hit 3
@ at 1000 with enfield MK4 and factory ammo> IT IS IN YOUR HEAD BELIEVE THIS ONLY- NOT THE BULSHIT XXXX Dave |
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OK, I’ve been watching this thread with great interest. I haven’t heard of a Windham Weaponry SRC, but I’m guessing it’s chambered for the NATO 5.56 cartridge. I bought an AR 15 chambered in 5.56 five years ago. From the first day I fired that AR I was disappointed in its accuracy out passed 50 yards. It was producing groups just like the groups you have. I relegated that rifle to the back of my gun safe. I recently pulled it out determined to find out why this rifle wasn’t grouping.
Long story short, it’s the throat of the 5.56 chamber that causes the pour accuracy. The throat on the 5.56 averages .162” long and that makes for a large amount of bullet jump from the case neck into the rifling of the barrel. A .223 chambered barrel's throat is around .085“or roughly half the distance. Think of a perfectly spinning football spiral. If the bullet enters the rifling just a little off to one side it effects the spiral spin and the bullet could destabilize sooner. The bigger the distance for the bullet to jump, the bigger the chance of an unstable bullet launch. The bullet Ogive is the curve of the bullet where the curve starting from the tip forms more of a straight line. This is the first area to engage the rifling. There’s a perfect distance for each cartridge and its bullet Ogive into the rifling. It’s usually somewhere between .015” and .020”. Bench rest shooters make sure their cartridges are as close to the perfect distance as they can adjust the depth of the bullet into the case to increase or decrease the overall length (OAL) of the cartridge. There’s a maximum length as limited by the size of the magazine to feed reliably. The max overall cartridge length for an AR is limited by the size of the magazine and that requires a cartridge no longer than 2.275” OAL. What does that mean to us as shooters? When a .223 Remington cartridge is fired from a 5.56 chambered barrel, it requires the bullet to jump twice as far as it would have jumped if it were fired from a .223 chambered barrel. So, our 5.56 chambered ARs can only give us limited accuracy with .223 ammo. If you can’t find the perfect OAL for your cartridges, because of the limit of the magazine, you may find that a heavier bullet gives about the best accuracy we can expect from these rifles. This is what I've found researching and testing this summer after I installed a JP trigger, and adjusted the OAL of my cartridges to the max length using Sierra Match King bullets in front of 24 grains of Reloader 15 powder. It pretty much cut my group sizes in half, but it's not a 1 MOA rifle at 100 yards. It's closer to a 2 MOA rifle and may be slightly better if I do my part. |
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OK, I’ve been watching this thread with great interest... Good post 72stick. Now let me add one thing. I have heard that some custom built .223rem ar15 shooters here in Finland claim that their rifles are capable of 0.35-0.45 MOA accuracy with hand loaded match ammo in a good day. Though the eye-witnesses for such a small groups seem to be non-existent. I've never seen or witnessed anybody with ar15 to shoot groups that small. When I'm at the range same time with these guys, the groups are always bigger than what they boast, but still good or at least acceptable. Of course there are always excuses for the accuracy results. "The wind was unpredictable", "The concrete was too slippery" or "I was unable to find good support for my elbow"... One thing might be the group size measurement methods. Similar logic that the respected member Molon represents in his great, accuracy related articles. Fire five shots. Drop off one unpleasant miss as an expected "flyer" because of inconsistent ammo and drop off one shot which is clearly a shooter made error and thus doesn't represent the rifle's true mechanical accuracy. Rest of the three shots form a nice, tight group, which is clearly a proof of the true accuracy... Another reason for such behaviour might be the price of those rifles. If you spend 3k to 4k euros to rifle (optics included), you will be very, very disappointed if the rifle isn't as accurate as expected or as the vendor claimed. Besides, it's not an easy task to complaint about the less-than-expected accuracy. Other people might blame me for the results, or think that I'm not a qualified shooter. Papachaz, if you're getting 3 MOA groups from 100 meters with standard issue or basic ar15, that's acceptable. If you get 2MOA groups, be satisfied. Unrealistic expectations are a base for most of the disappointements and frustration. |
[ARCHIVED THREAD] - expected accuracy? (Page 1 of 2)
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