Liberty's patented lead-free high-performance ammunition combines a significantly flatter trajectory, immediate synchronous spin, optimization for gyro stability, and yaw independence contributing to superior ballistic coefficients and improved accuracy extended range. Series Protection Caliber 45 Colt Application Home Defense Bullet Type Lead Free Fragmenting Hollow Point Bullet Weight 78 gr Muzzle Energy 560 ft lbs Boxes Per Case 50 Bullet Coating Nickel-Plated Rounds Per Box 20 Casing Material Nickel-Plated Brass Muzzle Velocity 1800 fps Unit Of Measure box