After decades of packing a 7RM, I've been going the opposite direction for a number of good reasons. Improved terminal performance of lighter laser beams being one. The 300 RUM is a serious hammer at either end, even with a brake. Just ask the guys shooting 6 stations to the left and right of your pappy when he uncorks that braked beast... after they pick up their hats.

Case head stamp is a mere means to an end. There are more efficient ballistics in things 0.284, and smaller, that'll effortlessly anchor elk and moose, sans the inevitable flinch of tripping the trigger and packing same all day long....