09-03-2009, 03:03 PM
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#10 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
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Quote:
Originally Posted by tvfreakazoid
how about 1:8 twist? I've seen this on some ar 15. My pof has a 1:8 twist.
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I donno, I've never read up much on people's experiences with 1:8. I would assume it's fine for at least 69gr ammo, and probably 75gr. Not so sure about the super-heavies like 78's and 80's though. 1:7 is kinda the official standard for short barrels and heavy bullets though, and it's what you get on real M4's. Slower twists are compromises to be sure you don't spin-fragment light bullets, but 55gr ammo works fine in 1:7, and there's really no use for shooting anything lighter than that unless you're actually doing the varmint-hunting thing (as in, using an AR to kill groundhogs and the like).
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