I have a stainless steel 30" 7 twist, small shank, varmint profile, target crown, 6mm bore, barrel that has not been chambered yet, I am just not a fast twist shooter, so I had Apache hold off, $339.00 chambered to your specs, I was going to go they 6mm X 55 route, and I still am only with a identical barrel they only difference it is in 10 twist.
Dean
Dean