With 1/7, generally anything in the upper 60s to upper 70s will be the most accurate, but it really comes down to the individual barrel, upper, and bolt. No way to know 'til you try it.
Barrel twist rate and # of groove question
A 16 " barreled AR 556 with 1 in 7 twist rate and 6 grooves What weight of bullet should the most accurate?
A 16" barreled AR 556 with 1 in 7 twist rate and 4 grooves What weight bullet should be the most accurate?
A 16" barreled AR 556 with 1 in 7 twist rate and 4 grooves What weight bullet should be the most accurate?
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