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