Super-X ammunition has provided exceptional quality and outstanding performance for all types of hunters and shooters who rely on its time-proven dependability backed by legendary excellence. - Caliber : 45 Automatic Colt Pistol - Bullet Weight : 185 gr - Bullet Type : Winclean Brass Enclosed Base - Muzzle Energy : 411 ft / lbs - Muzzle Velocity : 1000 fps - Rounds Per Box : 50