1. Goldy300

    New 300 WinMag 215 Bergers

    So I recently finished building my 300 WinMag. It is Defiance Action, Manners stock, 28” Proof CF 1:9 twist barrel. I set out to do a load developement with 215 Bergers and found myself confused. Load = Hornady Brass, 215M primers, CBTO 2.95 .010 off the lands. It has custom throat. I started...