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Old May 18, 2018, 09:01 AM   #26
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Originally Posted by riffraff
Wow this got interesting..

So what is the downside then to a 1:7 twist, or why do they make so many in 1:8, 1:9, etc.. etc.. if you see the same accuracy, seems like there ought to be a downside?
Green Mountain recently sold 1:5 or 1:6 barrels too.

I've heard the downside or higher twist rates is faster wear, but you want enough twist to keep your bullet length stable. In my 1:12 barrel, steel core 62gr makes hilarious foot wide groups at 50 yards.
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Old May 18, 2018, 04:52 PM   #27
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Hornady Steel training 75gr... I have shot this out to 794yds, at a man-sized steel target. Many hundreds of it fired.. no issues what so ever from 5 different AR15's.

Or the 62gr GD....
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Old May 18, 2018, 06:38 PM   #28
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Working with the 224 valk has been an eye-opener for me in regards to the 224 projectile--my guess is that if you give it enough gas a conventional 7 twist will give you fine results up to 80 grs or so.
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