Finally took my AT 308 20 (factory LW 1:12) and 260 26 barrel (from MH, 1:8) to the range, shot some factory ammo and handloads, much more accurate than my old savage. However, I've noticed a new issue.
From the really mild loads (IMR4895 42.2 OR IMR4064 41.5, 0.02 off lands), my brasses are...