On my AR I have a 1 in 9, 20 inch chrome Rock River arms barrel which is very accurate.
I have another barrel which is a CMMG 22 inch 1:9 I have never been able to get it to shoot.
I’m looking into a 1:7 so I can shoot 75 gr.
That is the nice thing about AR’s
I know you’re asking about bolt but I have been trying multiple on AR’s and they can be different just due to make of barrel with the same twist.
Baddarryl remember, the only dumb question is the one you never ask.
And the only dumb answer is ,,,,,,,,, well you know.,