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Thanks. The new picture clarified it perfectly. It does look more easily centered in your rest with this adapter. And that makes me think about how sloppy my inexpensive front bag is with most forends, let alone rails. And my rest is a Lyman elevating rest with a Caldwell front rest bag, so it's not like I've spent a bunch on it, but still... Quoted:
Thanks. The new picture clarified it perfectly. It does look more easily centered in your rest with this adapter. And that makes me think about how sloppy my inexpensive front bag is with most forends, let alone rails. And my rest is a Lyman elevating rest with a Caldwell front rest bag, so it's not like I've spent a bunch on it, but still... You might find this interesting. . . Excellent results can be obtained from accuracy/precision testing using simple and inexpensive front and rear "sand bags" such as those made by Caldwell. 
I conducted a comparison between using the Caldwell bags versus using my Sinclair Bench-rest and Protektor rear bag. Using one of my Krieger barreled AR-15s and hand-loaded 52 grain Sierra MatchKings I was able to obtain a 10-shot group from 50 yards measuring 0.340" using the Caldwell bags. Using the same barrel and hand-loads with the Sinclair rest, I fired a 10-shot group from 50 yards that measured 0.316". This doesn't mean I'm going to give up my Sinclair rest, but it shows you're not altogether handicapped without one. 
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You might find this interesting. . . <snip> Using the same barrel and hand-loads with the Sinclair rest, I fired a 10-shot group from 50 yards that measured 0.316". This doesn't mean I'm going to give up my Sinclair rest, but it shows you're not altogether handicapped without one. https://app.box.com/shared/static/o6fwuf42sig3eqvsmvz4ndtohhyoh8x1.jpg I have two different sizes/heights of rear bags, also Caldwell, and I have a piece of open-cell foam to put them on for more height with an AR. Using Old Painless' "Shooting From A Benchrest" instructions, I've been pretty happy with the rear bags. But I seemed to always struggle with the front rest. Probably because the front bag didn't fit... |
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My front rest is an old Hoppe's tripod-style rest I got on clearance. (I thought it was Lyman at first because it's orange...) I have a Caldwell wide front bag on it. I think that's a problem, because it doesn't really "fit" any of my rifles - ARs, M1 Carbine, M1 Garand, anything. Would it be better to get the narrow front bag, or go in some different direction, like making some sort of mod to the top of the rest as well? A Sinclair rest certainly isn't in my budget! I have two different sizes/heights of rear bags, also Caldwell, and I have a piece of open-cell foam to put them on for more height with an AR. Using Old Painless' "Shooting From A Benchrest" instructions, I've been pretty happy with the rear bags. But I seemed to always struggle with the front rest. Probably because the front bag didn't fit... Quoted:
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You might find this interesting. . . <snip> Using the same barrel and hand-loads with the Sinclair rest, I fired a 10-shot group from 50 yards that measured 0.316". This doesn't mean I'm going to give up my Sinclair rest, but it shows you're not altogether handicapped without one. https://app.box.com/shared/static/o6fwuf42sig3eqvsmvz4ndtohhyoh8x1.jpg I have two different sizes/heights of rear bags, also Caldwell, and I have a piece of open-cell foam to put them on for more height with an AR. Using Old Painless' "Shooting From A Benchrest" instructions, I've been pretty happy with the rear bags. But I seemed to always struggle with the front rest. Probably because the front bag didn't fit... There's a lot of thought that needs to go into front and rear bags, from what they're filled with to how hard they are, to what they're coated with. There's more than just plunking a gun down in it and shooting groups. |
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There's a lot of thought that needs to go into front and rear bags, from what they're filled with to how hard they are, to what they're coated with. There's more than just plunking a gun down in it and shooting groups. Quoted:
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You might find this interesting. . . <snip> Using the same barrel and hand-loads with the Sinclair rest, I fired a 10-shot group from 50 yards that measured 0.316". This doesn't mean I'm going to give up my Sinclair rest, but it shows you're not altogether handicapped without one. https://app.box.com/shared/static/o6fwuf42sig3eqvsmvz4ndtohhyoh8x1.jpg I have two different sizes/heights of rear bags, also Caldwell, and I have a piece of open-cell foam to put them on for more height with an AR. Using Old Painless' "Shooting From A Benchrest" instructions, I've been pretty happy with the rear bags. But I seemed to always struggle with the front rest. Probably because the front bag didn't fit... There's a lot of thought that needs to go into front and rear bags, from what they're filled with to how hard they are, to what they're coated with. There's more than just plunking a gun down in it and shooting groups. |
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I came to a solid realization yesterday while zeroing my new precision upper build.
A mil spec trigger dont cut it. There was no way to really judge my set up, the trigger jerk( the physical trigger action, not the shooter), was so magnified by the scope, that I got pretty close then just quit. I was wasting ammo at that point. This place is expensive. 
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This place is expensive. You're tellin' me! I'm working very hard at deciding between a Sinclair Heavy Varmint BR Rest and a Sinclair Light Weight Rest that will need a different top, and maybe some "other" rest. Lots of research on rests just makes me more confused. None of it is priced in the "pick it up and try it out" category. I really, really like the Cowan rest: 
But even though it's a great rest, it supports a very worthy cause* and is very affordable (comparatively speaking), there's a substantial lead time involved. Another good looking one is the Bald Eagle Slingshot Rest: 
But it's got some mixed reviews (which research seems to indicate may be due to the fact that it's no longer American made - now made in Taiwan (at least not in China!)). The price at bullets.com ($165-$199) is really, really attractive, though! So, to not continue derailing this thread, it's NOT easy to come up with a stable, sturdy, effective front rest without spending quite a large amount of money, though all of these rests are apparently solid, reliable, and will last forever. The flip side is that, in order to shoot to the capability of the rifle and the ammunition, you must have something that works well to keep the rifle stable while aiming. *The Cowan rest is made by a machine shop class at the Altoona PA Center for Technical Careers; all proceeds benefit the school and the students. |
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I came to a solid realization yesterday while zeroing my new precision upper build. A mil spec trigger dont cut it. There was no way to really judge my set up, the trigger jerk( the physical trigger action, not the shooter), was so magnified by the scope, that I got pretty close then just quit. I was wasting ammo at that point. Stick with it. You have good powers of observation and you're honest enough with yourself to admit what you're seeing. That's the key to learning. I've learned a lot about precision shooting with an AR-15 from dry-firing off a bench-rest at a distance of 100 yards using a 45X power scope. ... |
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Stick with it. You have good powers of observation and you're honest enough with yourself to admit what you're seeing. That's the key to learning. I've learned a lot about precision shooting with an AR-15 from dry-firing off a bench-rest at a distance of 100 yards using a 45X power scope. ... Quoted:
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I came to a solid realization yesterday while zeroing my new precision upper build. A mil spec trigger dont cut it. There was no way to really judge my set up, the trigger jerk( the physical trigger action, not the shooter), was so magnified by the scope, that I got pretty close then just quit. I was wasting ammo at that point. Stick with it. You have good powers of observation and you're honest enough with yourself to admit what you're seeing. That's the key to learning. I've learned a lot about precision shooting with an AR-15 from dry-firing off a bench-rest at a distance of 100 yards using a 45X power scope. ... Thanks. I know when its me, and am loathe to blame hardware. But if the thing is shaking trying to get to the break on a stock trigger, I cant even correct breathing or tighten up the optics window. New trigger inbound. I am starting conservative. ALG ACT with the purple spring, 4 lbs I believe. No problems if its not effective enough, I can stuff it in my SBR. Plus it was $59 bucks from PA. |
| You'll notice the difference in the ACT right away. With the stock Geissele springs, the ACT feels awesome. There is a smoothness that is better than a really well broken in stock trigger, while mine both break really crisply, without any of the mush feeling that comes from a broken in but worn trigger. |
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You'll notice the difference in the ACT right away. With the stock Geissele springs, the ACT feels awesome. There is a smoothness that is better than a really well broken in stock trigger, while mine both break really crisply, without any of the mush feeling that comes from a broken in but worn trigger. Thanks for the feedback. I am installiing it in a few minutes. Eta So this is interesting. Dont mean to sidtrack a great thread. The hammer in the old trigger had 2 "s" inside a small squares. And so did the ACT hammer. Forge marks the same? |
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Ha! Testing the ACT tomorrow with the"precision" set up. Still using factory ammo tho |
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Great post! Look forward to reading more in the future. Thank you for sharing your work. You will probably appreciate this, from the experts at ballistipedia.com . . . http://ballistipedia.com/index.php?title=Describing_Precision From the above link: •Extreme spread of a 3-shot group, usually at 100 yards. This is statistically almost meaningless, especially when there is no reference to how many 3-shot groups were sampled. •The US Army Marksmanship Unit at Ft. Benning, GA uses a minimum of 3 consecutive 10-shot groups fired with the rifle in a machine rest when testing service rifles. •Armed forces also often explicitly uses the more statistically powerful Mean Radius and Circular Error Probable measures. •An extended practical, and amusing, critique of the 3-shot group is archived here. The hot-link above takes you to a thread on AR15.com: http://www.ar15.com/mobile/topic.html?b=3&f=118&t=279218 That thread is entitled: The Trouble With 3-Shot Groups By Molon While you’re on ballistipedia.com, check out the references page: http://ballistipedia.com/index.php?title=References From the references page: Molon, 2006, The Trouble With 3-Shot Groups Through an extended forum thread, Molon offers intuitive explanations and illustrations of the problems with Extreme Spread samples. We have not been able to identify the real person behind that now-inactive user account. If anyone knows please contact us so we can give well-deserved credit! .... |
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#16 A Note on AR-15 Barrel Break-In Even an expensive, single-point cut-rifling stainless-steel Krieger barrel that has been chambered and hand-lapped by Krieger can benefit from a judicious break-in. The first bore-scope pic below is from the leade of one of my brand-new Krieger AR-15 barrels (that was purchased directly from Krieger and that was chambered and hand-lapped by Krieger) prior to firing. As you can see in the pic, there are still tooling marks on the lands in the leade running perpendicular to the bore direction. The barrel won't shoot to its potential until those tool marks have been removed. https://app.box.com/shared/static/xw1pctrgrx0vha0gdsj8j7dkdtijqhyp.jpg The next bore-scope pic shows the same barrel after I conducted a short break-in procedure. The tooling marks on the lands in the leade are completely gone. https://app.box.com/shared/static/2koe5zz4o1js1g3t0a3l28z8q75s7zld.jpg So whats the break in procedure? |
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