Well I have played around with the rimfire benchrest for a little while and now have picked up a used trued Remington 700LA, pinned holland recoil lug, Kreger 1/10 twist barrel chambered in 6mm AcK IMP .267 neck. I have taken 7x57 norma brass, sized, neck turned and fire formed it.
I have a few questions.
Is the 6mm AIP worthy of 600 yard competition accuracy?
What grain projectile would you recommend for the twist rate?