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Posted: 10/26/2011 3:15:56 PM EDT
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i am posting this in the optics forum in hopes of getting answers based people that have experienced this on scoped rifles.
assuming you are of the opinion that accuracy is affected by things that disrupt the barrel harmonics, do you think a PRI front flip up sight/gas block, that uses draw bolts, will affect accuracy by changing the barrel harmonics? say at distances of 400 yards? |
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Personally, I have not seen any change in accuracy from switching gas blocks on an AR15, and I doubt you will either. (I have a 20" HBAR tho)
Barrel harmonics won't be 'disrupted' by a front sight gas block. If they change at all, its hard to say whether a given device will improve or hurt the existing harmonics. If it does change harmonics, it may show up as a slight preference for different ammo than before. (barrel harmonics vary with the load) Distance to the target doesn't really factor in, as harmonics are internal ballistics and not external ballistics. |
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I've seen plenty of rifles with the PRI flip-up assembly, and they are .5 MOA guns with either Krieger or Douglas barrels, pushing 77gr Scenars out to 850m for reliable hits on silhouettes.
If you are truly chasing the accuracy bug in the AR, start with a quality pipe, get the receiver extension face trued to the bore axis, a good mate of the barrel extension to the upper, and use high-end ammo. I only hand-load for precision rifles, since I don't know if any box ammo will be tuned to my particular barrel or not. Most will say get a good barrel and trigger, but you can edge forward a little more with the blue-printing. |
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