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Posted: 3/28/2014 7:12:58 AM EDT
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Found this article on Truth About Guns. Good read.
Ask Foghorn: Barrel Twist, and Which is Right for Your AR-15? |
Good Read!
I've been using this one. Never failed me yet
.223 1:9 For bullets heavier than 63 gr. 1:12 For bullets up to 63 gr. 1:14 For bullets up to 55 gr. 1:15 For bullets up to 55 gr. driven 4,100 fps or more 1:16 For bullets up to 55 gr. driven 4,300 fps or more http://www.shootandreload.com/2011/06/15/bullet-weight-vs-barrel-twist/ |
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