Nosler Trophy Grade Ammo. A sure Shot! Manufactured to Nosler's strictest quality standards to attain optimum performance no matter where your hunting trip takes you. Nosler Trophy Grade Ammunition has the right load for the right game!Cartridge: 270 WSM AmmoBullet Wt. Grains: 140Bullet Style: ABMuzzle Velocity (F.P.S.): 3,100Muzzle Energy (Ft.-lbs.): 2,987Rounds per box: 20.