Re: AR15: What is your twist rate?
1-7 on my WOA 14.5" stainless
1-9 on my Bushmaster 20" HBAR
I would think 1-9 would be fine if you plan on mostly shooting the cheaper lighter bullets, and the 1-8 or 1-7 would be a better choice for the heavier stuff. (Which tend to be more expensive)