Hornady Superformance 300 Win Mag 165 CX SPF 20 Rnd, 3260 FPS

Superformance uses progressive propelleants that hake your favorite SST,GMX and InterBond bullets to levels of performance that are simply unattainable with conventional ammunition. 100-200 FPS faster than any conventional ammo. Safe for use in all firearms types. 20 rounds per box.