Official .260 tOBR Thread-Pics/Range/Loads/Updated Thread Index (Page 52 of 188)
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Originally Posted By mettee:
So the hornady grows by 0.0035, and it is 0.0095 from the unfired Hornady to the Hornady modified case, looking like the modified case woud be "tight"? Does it fit in the chamber closed bolt? Your fired case is 1.6225, telling me that is roughly the chamber size, and the mod case is 0.006 bigger/longer... Maybe we are seeing why the hornady does well in these rifles? Originally Posted By mettee:
Originally Posted By Defender3:
This will have to serve as the official update for today. I measured the cases using the Hornady comparator. I zeroed to comparator and then measured the Hornady LNL case, then the new unfired case, then a once fired case. Zeroed on the caliper: https://www.AR15.Com/media/mediaFiles/52736/IMG_6805_JPG-460947.jpg Hornady LNL case: https://www.AR15.Com/media/mediaFiles/52736/IMG_6808_JPG-460946.jpg New, unfired Hornady case: https://www.AR15.Com/media/mediaFiles/52736/IMG_6806_JPG-460948.jpg Hornady once fired in the LaRue: https://www.AR15.Com/media/mediaFiles/52736/IMG_6807_JPG-460949.jpg Maybe we are seeing why the hornady does well in these rifles? ETA - Yup, posted the wrong pictures. OP corrected and replicated here. Hornady LNL case: 
New, unfired Hornady case: 
Hornady once fired in the LaRue: 
@mettee |
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Originally Posted By Defender3: Standby, let me make sure I posted the right pictures. I have so many I may have screwed it up... ETA - Yup, posted the wrong pictures. OP corrected and replicated here. Zeroed on the caliper: https://www.AR15.Com/media/mediaFiles/52736/IMG_6805_JPG-460947.jpg Hornady LNL case: https://www.AR15.Com/media/mediaFiles/52736/IMG_6811_JPG-461153.jpg New, unfired Hornady case: https://www.AR15.Com/media/mediaFiles/52736/IMG_6813_JPG-461154.jpg Hornady once fired in the LaRue: https://www.AR15.Com/media/mediaFiles/52736/IMG_6815_JPG-461155.jpg @mettee And the hornady case is still growing by 0.003 I am curious to see how the rest of the 260 brass is sized in comparison. |
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Originally Posted By FRBaseball: Crazy how accurate QL can be. My true chrono #'s were 2889 for 10 rounds, SD of 8.1. SIDE NOTE: For me personally, I don't pay any attention to chamber pressure #'s from QL or any reloading manual when I'm loading for a gasser. Loads that will blow primers left and right and show serious signs of overpressure on brass when fired from a gasser are perfectly fine in my bolt guns. I think port pressure is the culprit, but with so many variables in gas system length, port diameter, number of ports, and dwell time, there's no hard and fast numbers to go by when loading for a gasser. I don't care what the reloading manuals say is safe as far as chamber pressure because port pressure will start causing issues long before chamber pressure will. Back on topic, my practice load varies depending on what bullets I've got on hand, but I've had good results with the 120-123 class bullets, AMAX, ELD-M, and Custom Competitions, all using R16 around 42 grains. I use those light bullets because I usually have a good supply of them at the house, I shoot them through a shorty .260 Rem Tikka. I think I might have found my grail load for the LaRue .260 today. I got a shipment in last week of the new Nosler 130 RDF bullets. Loaded up a rough test from 42 to 42.8gr of R16. 42gr stuck all 5 into .4". More important to me than the slight increase in accuracy was the significant reduction in felt recoil. The recoil impulse was soft and smooth as butter, and the brass came out looking like new. No ejector swipes, no cratered/flowing primers. Just clean brass. Same powder charge under a 130 Berger produces a completely different recoil impulse, and shitty accuracy. I can't explain it, but I sure as shit can feel it. Maybe the difference in the bearing surface length between the two bullets? I'm guessing velocity will be down around 2820, but the RDF has a higher BC than the Berger, so even if I do lose 70fps, at 1K it's a wash. I'll lose .2 in elevation, but gain .1 in wind resistance with a 10MPH full value wind, so nothing to worry about. I've got 30 rounds of that load ready to go in fresh brass, I'll report back in after I shoot them. I'll chrono 10 and then shoot a 4x5 on a LaRue target. |
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Originally Posted By mettee:
I mean to respond to this, great info. I have not noticed any particular difference in felt recoil over the three bullets I have shot. ELD, AR Hybrid 130, and the Norma GT. Originally Posted By mettee:
Originally Posted By FRBaseball: Crazy how accurate QL can be. My true chrono #'s were 2889 for 10 rounds, SD of 8.1. SIDE NOTE: For me personally, I don't pay any attention to chamber pressure #'s from QL or any reloading manual when I'm loading for a gasser. Loads that will blow primers left and right and show serious signs of overpressure on brass when fired from a gasser are perfectly fine in my bolt guns. I think port pressure is the culprit, but with so many variables in gas system length, port diameter, number of ports, and dwell time, there's no hard and fast numbers to go by when loading for a gasser. I don't care what the reloading manuals say is safe as far as chamber pressure because port pressure will start causing issues long before chamber pressure will. Back on topic, my practice load varies depending on what bullets I've got on hand, but I've had good results with the 120-123 class bullets, AMAX, ELD-M, and Custom Competitions, all using R16 around 42 grains. I use those light bullets because I usually have a good supply of them at the house, I shoot them through a shorty .260 Rem Tikka. I think I might have found my grail load for the LaRue .260 today. I got a shipment in last week of the new Nosler 130 RDF bullets. Loaded up a rough test from 42 to 42.8gr of R16. 42gr stuck all 5 into .4". More important to me than the slight increase in accuracy was the significant reduction in felt recoil. The recoil impulse was soft and smooth as butter, and the brass came out looking like new. No ejector swipes, no cratered/flowing primers. Just clean brass. Same powder charge under a 130 Berger produces a completely different recoil impulse, and shitty accuracy. I can't explain it, but I sure as shit can feel it. Maybe the difference in the bearing surface length between the two bullets? I'm guessing velocity will be down around 2820, but the RDF has a higher BC than the Berger, so even if I do lose 70fps, at 1K it's a wash. I'll lose .2 in elevation, but gain .1 in wind resistance with a 10MPH full value wind, so nothing to worry about. I've got 30 rounds of that load ready to go in fresh brass, I'll report back in after I shoot them. I'll chrono 10 and then shoot a 4x5 on a LaRue target. I'm waiting on the new scale and will work some loads across several bullets. I may give the Nosler 123 custom comps another try as they didn't do too well the first time around. |
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Originally Posted By mettee:
Fail. Nothing stops the mighty 260 update! Originally Posted By mettee:
Originally Posted By Defender3:
Sorry, no update today, the Charity Raffle is keeping me busy today. 
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Originally Posted By mettee:
I mean to respond to this, great info. I have not noticed any particular difference in felt recoil over the three bullets I have shot. ELD, AR Hybrid 130, and the Norma GT. Since it's just about you and me in the thread, if you're sick, I get a break for the daily grind. 
@mettee |
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Originally Posted By Defender3: Hearing you may be sick, hope you don't have the flu, it was 10-days of pain for me. Since it's just about you and ne in the thread, if you're sick, I get a break for the daily grind.
@mettee No breaks D3, I just finished up a couple reports
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Here's my TPS report for the weekend.
I got some of the Berger 130 VLDs at a great price during the bullets.com going-out-of-business sale. Here's pictures of the Berger 130gr Hybrid OTM versus the Berger 130gr VLD, with the WFL for comparison. The numbers are the length of the projectile. 
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Originally Posted By mettee:
Do you notice that area in WFL right before the boat tail? It looks concave. Like they did it to reduce bearing surface, or play with aero |
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| Got out to do some shooting with a friend from Utah this weekend. The .260 was flawless as usual. The most notable shot was today’s cold bore hit at 1265 yards. 12.4 mil with 1.6 of left wind. Target is a 12”x 20” silhouette. Clay birds on a berm at 700 were a chip shot. I think I sold another rifle for Mark. Has anyone got their commission check yet? Oh yeah I was shooting against a 6br and a 6 creed. The 260 was victorious. I was shooting my 130 TMK load. |
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Originally Posted By rugerdog:
Got out to do some shooting with a friend from Utah this weekend. The .260 was flawless as usual. The most notable shot was today’s cold bore hit at 1265 yards. 12.4 mil with 1.6 of left wind. Target is a 12”x 20” silhouette. Clay birds on a berm at 700 were a chip shot. I think I sold another rifle for Mark. Has anyone got their commission check yet? Oh yeah I was shooting against a 6br and a 6 creed. The 260 was victorious. I was shooting my 130 TMK load. |
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Originally Posted By bfk4lyfe:
https://i.imgur.com/6l9tYZs.jpg Just when I got my components, dies etc in order to start reloading for the 260....a distraction comes along... |
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Originally Posted By Defender3: Now, you just can't leave us hanging like that! Details man, details! Its been a 308 for a year or so but I sold off all my 308 reloading components this weekend so the CM barrel went on. Still need a muzzle break, can't decide since they're all pretty much the same. |
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Originally Posted By bfk4lyfe:
Accuracy International AT, 26" 6.5 CM Gradous barrel, Spuhr mount and Bushnell HDMR2 (some day I'll pull the trigger on a Vortex Razor2 but I'll gbpse lol..) Its been a 308 for a year or so but I sold off all my 308 reloading components this weekend so the CM barrel went on. Still need a muzzle break, can't decide since they're all pretty much the same. Originally Posted By bfk4lyfe:
Originally Posted By Defender3: Now, you just can't leave us hanging like that! Details man, details! Its been a 308 for a year or so but I sold off all my 308 reloading components this weekend so the CM barrel went on. Still need a muzzle break, can't decide since they're all pretty much the same. |
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Originally Posted By bfk4lyfe: Accuracy International AT, 26" 6.5 CM Gradous barrel, Spuhr mount and Bushnell HDMR2 (some day I'll pull the trigger on a Vortex Razor2 but I'll gbpse lol..) Its been a 308 for a year or so but I sold off all my 308 reloading components this weekend so the CM barrel went on. Still need a muzzle break, can't decide since they're all pretty much the same. |
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Originally Posted By mettee:
D3 did you look at the boat tail on the WFL yet. Now that I am seeing it on the puter it really shows. |
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Originally Posted By mettee:
How did they turn out? Originally Posted By mettee:
Originally Posted By Defender3: Not yet, had to do some upgrades to the lighting. 
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Originally Posted By mettee:
Thats what I am talking about |
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There is a concave section in the flatlines. I didn't go though all the tech specs in the patent application, so I'm not sure the engineering / technical jargon for that bit of a wasp waist. Oh, and this and the lighting upgrad are today's updates.
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Originally Posted By Defender3: I reused the original two and the four new ones are linkable, so I was able to wire them all up using one connection. The basement is like a black hole, it sucks any light within 3 parsecs in but doesn't let any back out. With 240w's of LED goodness at 5000 degrees, I can see pretty well now. 
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Originally Posted By Defender3:
There is a concave section in the flatlines. I didn't go though all the tech specs in the patent application, so I'm not sure the engineering / technical jargon for that bit of a wasp waist. Oh, and this and the lighting upgrad are today's updates.
https://www.AR15.Com/media/mediaFiles/52736/IMG_6866_JPG-465425.jpg Looks like it shortens the bearing sureface, and I bet it does something with aero, they wont say that though. |
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Originally Posted By DuneShoot:
D3- what direction and amount of POI shift did you see with your TQ can? Finally got mine, hope to try it soon.  |
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Originally Posted By mettee: You are scratching them all up man Looks like it shortens the bearing sureface, and I bet it does something with aero, they wont say that though. |
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Originally Posted By Defender3: I'll have to find it again, but that band that runs across the top section of the bearing surface has a name and purpose. Well I know creating a small vortecies can support airflow over them while at the same time shaping that same airflow. Blah blah blah turbulent boundary layer
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Originally Posted By mettee: On the top? Well I know creating a small vortecies can support airflow over them while at the same time shaping that same airflow. Blah blah blah turbulent boundary layer |
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Originally Posted By Defender3: You should expect a bit down and a bit to the right. It will vary based on the rifle and the ammo, but mine is 1.5MOA down with the Hornady, your mileage will vary. Go shoot it and give us a range report with pictures please. |
I have been asked to point out that I am LaRue Tactical's owner.
My work has been used by tens of thousands of US Military personnel,
and tens of thousands of civilian shooters - ML
My work has been used by tens of thousands of US Military personnel,
and tens of thousands of civilian shooters - ML
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Originally Posted By LaRue_Tactical:
Pretty sure Isaac Newton made the 1.5 moa low effect. The thing I like is you get your zero with can on, then with can off you're 1.5 moa high at a 100 ... workable. Originally Posted By LaRue_Tactical:
Originally Posted By Defender3: You should expect a bit down and a bit to the right. It will vary based on the rifle and the ammo, but mine is 1.5MOA down with the Hornady, your mileage will vary. Go shoot it and give us a range report with pictures please. |
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Originally Posted By Defender3:
Nice report - thanks! 6br and 6 creed are great cartridges, were they shooting smaller so they could go faster? Originally Posted By Defender3:
Originally Posted By rugerdog:
Got out to do some shooting with a friend from Utah this weekend. The .260 was flawless as usual. The most notable shot was today’s cold bore hit at 1265 yards. 12.4 mil with 1.6 of left wind. Target is a 12”x 20” silhouette. Clay birds on a berm at 700 were a chip shot. I think I sold another rifle for Mark. Has anyone got their commission check yet? Oh yeah I was shooting against a 6br and a 6 creed. The 260 was victorious. I was shooting my 130 TMK load. |
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Originally Posted By rugerdog:
They are impressive. I think my friend likes them due to lack of recoil. Originally Posted By rugerdog:
Originally Posted By Defender3:
Originally Posted By rugerdog:
Got out to do some shooting with a friend from Utah this weekend. The .260 was flawless as usual. The most notable shot was today’s cold bore hit at 1265 yards. 12.4 mil with 1.6 of left wind. Target is a 12”x 20” silhouette. Clay birds on a berm at 700 were a chip shot. I think I sold another rifle for Mark. Has anyone got their commission check yet? Oh yeah I was shooting against a 6br and a 6 creed. The 260 was victorious. I was shooting my 130 TMK load. |
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Today’s update is a bit early as it’s the 37th Anniversary today and HH6 wants to go out for dinner a bit later.
So, we’ve been through the weighing of brass to learn the level of consistency in the cartirdges. Most fell within a grain, which means some may have a different internal volume (best measured using total water capacity), which then could possibly translate to a variance in pressure (a kernel of powder), which could then translate to a difference in POI at range. The real question is whether that kernels difference is noticeable at 1,000 yards or if the shooter's mechanics (and wind reading) are a better focus. I won't be weighing my brass in future. Next was sorting bullets for weight and BTO (remember, I have lots of time on my hands). I sort for weight so I can touch every round to find the ones that are malformed and catch the ones that are out of norm for weight. I then sort for BTO so I can aid consistency in the seating process. Knowing, for example, I have a group of bullets that are a thousandth longer, allows me to adjust the click die by a thousandth so all the loaded rounds are consistent for BTO, and thus the jump to the lands on my rifle. Here’s a scatter chart showing the dispersion of the 100 WFLs by weight, than then the remaining 98 for BTO (I culled one from each end of the spectrum). 
I had hoped to move to a discussion on the seating process, but my 21st Century Hydro Press was abused by USPS and they somehow managed to lose the upright post that holds the mechanism. So, I'm all dressed up with no place to go right now until 21st can send me the replacement part. 
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Originally Posted By Defender3: Look at the brighter band area that runs down the bearing surface. It's forward of the concave area and behind the ogive. It's on each projectile and not due to lighting. I do see bands in the bearing surface but I dont see any other features, at least nothing thats a deliberate dimension. Not saying its not there. |
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Originally Posted By mettee:
Search Esstac, that is the screen name. Originally Posted By mettee:
Originally Posted By bfk4lyfe:
What happened to that other 260 thread that was called something like "a tale of two 260s"? It had some good info and pics in there but its MIA..? |
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Thanks!
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Originally Posted By DuneShoot:
Got the Larue brake and TQ installed. Couldn't get the brake timed right with teh Larue logo facing up. Think I'll DEMAND a refund
https://i.imgur.com/NL3qOe1.jpg https://i.imgur.com/tVbsYZM.jpg https://i.imgur.com/PbtscPY.jpg Comparison with the SiCo Omega: https://i.imgur.com/ZnVcHXW.jpg Were you serious about the timing? My sarcasm meter isn't calibrated today. |
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@esstac- Your thread detailing the Tale of TWO-60s was archived. I hope you don't mind, but I pirated your reloading data and reposted it here since it was such good data. Did you note seating depth on your differing loads? From the original esstac- thread: First day of shooting we worked on some loads and got the two UU's sighted in, was a balmy 32deg. My first grouping, 41/41.5/42/42.5/43g of H4350 under a Hornady 130g ELD-M. With one that decided it did NOT want to be a part of the group.... @100y (measured in inches, not moa) 
InfiniteGrim's First, Sierra 130g TMKs at 41/41.5/42/42.5/43g of H4350, @100y 
Some load data, mostly greek to me. UUr is Infinites rifle, UUs is mine Hornady 130g ELDM 
Nosler 140g RDF 
Sierra 130g TMK 
Prime 
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