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Posted on 7/7/20 at 1:17 am to jimbeam
Since I'm new to this platform-
mine is a 1:7 twist. 16.5" barrel. I've heard that bullet weights like different lengths and twists.
Buddy of mine said should be good with 55gr bullets, I've read somewhere that heavier bullets do better with what I have.
Is it definitive, and is it noticeable within 100 meters?
mine is a 1:7 twist. 16.5" barrel. I've heard that bullet weights like different lengths and twists.
Buddy of mine said should be good with 55gr bullets, I've read somewhere that heavier bullets do better with what I have.
Is it definitive, and is it noticeable within 100 meters?
Posted on 7/11/20 at 10:25 am to jimbeam
quote:
Most ARs are 1:7 or 1:8.
Most are 1:7 or 1:9, 1:8 is a rather recent option. If you don't plan on shooting anything heavier or longer than M855, then a 1:9 twist is the better option of the three unless you are going SBR or pistol. Out of my 20" 1:9 RRA barrel I have no issues up to 75gr Hornady OTM's. The USMC wanted 1:9 twist when the M16A2 was under going evals but the Army wanted to be able run M856 tracers. That's why 1:7 twist was adopted, one of the instances where mil-spec means not the best choice was made.
This post was edited on 7/11/20 at 10:27 am
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