My shooting buddy just bought a 7mm-08 stevens 200 with 11.5 twist. I gave him a handful of odds and ends 7mm bullets that I had ranging from 139 gr to 160 gr some pointed some round nose. He reported they all shot within about a 3-4 inch circle and individual weights grouped from 1" to 1.5" . Moral I wouldn't worry, Just find a bullet that shoots how you like and go hunting.