Load up with the Winchester USA Full Metal Jacket 5.56 x 45 mm 55-Grain Rifle Ammunition - 20-Rounds. It has a 0.267 ballistic coefficient. The muzzle velocity is 3,270 fps, and has a 1,305 ft.-lb. muzzle energy. Winchester USA Full Metal Jacket 5.56 x 45 mm 55-Grain Rifle Ammunition - 20-Rounds - Rifle Shells at Academy Sports
