I'm looking for a load for my '06 that will approximate 308-'06 velocities with the 165gr Sierra Game King out of a 22' bbl. with a 12 twist. Here's where it gets sticky. It needs to shoot 1.5 moa or less using Win 748 powder, and I need to use Winchester cases and primers because I have tons of all the above components and you all now how everything is drying up.

Any help would be appreciated.