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1/25/2018 7:38:29 AM
Posted: 6/3/2003 2:11:43 PM EST
of the twist. My Colt has a twist of 1:7 is that better than 1:9 ?
Link Posted: 6/3/2003 2:29:31 PM EST
I don't know if I'd say it was better but it does have some advantages. Don't ask me why but the AR's I have with Colt 1x7 barrels are the most accurate bench rest shooting. That's with 52-62 gr bullets that I use for reloading and not just with heavy bullets either. See this is where the twist really matters. Faster twist, the heavier bullets you can use. A 1x9 barrel shoots 69 gr bullets very poorly in my experience, but a 1x7 can handle that and more. My Colt SP1 carbine has a 1x12 twist and shoots everything from .22 lr to 52 gr bullets just great. Long story short is try a bunch of different bullet grains and see what works best.
Link Posted: 6/3/2003 2:33:35 PM EST
Originally Posted By buck6571: of the twist. My Colt has a twist of 1:7 is that better than 1:9 ?
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buck, there is no better or worse just different. The 1:7 barrel has an accuracy sweet-spot at a bullet weight of 69grn while a barrel with a 1:9 twist has an accuracy sweet-spot of 62 grn and just FYI a 1:12 twist barrel centers at 55grn. Now this doesn't not mean you can't shoot bullet weights in a 1:7 up to 77grn or so but simply means - all other things being equal - you should achieve max accuracy with a 1:7 at 69grn.
Link Posted: 6/3/2003 3:51:15 PM EST
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