A 1:8 barrel will stabilize all 223 bullets up to, and including, 80 grain.
A 1:8 barrel will stabilize all 223 bullets up to, and including, 80 grain.
Your rate of twist slower will stabilze heavier bullets.
Heres what I've found to be true in all my AR's.
1-7" twist is ideal for 55gr bullets......period.
1-9"twist is ideal for 62gr bullets and up....period
My Stags are 1-7 My Colts are 1-9
My stags at 25yrds with 62gr FMJ, we're talking 1" groups @ 25 yrds. Dead center.
At 200 yrds, 3" groups
With 55gr bullets, 2" high @ 25yrds, @ 200yrds 1/4" grps
My Colts @ 25 yrds with 62 gr 2" high sub moa
@ 200yrds, dead on 1/8" grps