My re-barreled & accurized Kimber Montana in .300 WSM weighs 6 lbs, 3 oz. (without a scope) and shoots Federal factory ammo with 180 gn Barnes TSX slugs into 3-shot 1/2" groups at 100 yds with an average muzzle velocity of 3150 fps.

IMHO, the WSMs are not about the cartridge but about the short-action rifle that shoots it.

--shinbone