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 9mm Luger Application Home Defense Bullet Type Lead Free Fragmenting Hollow Point Bullet Weight 50 gr Muzzle Energy 450 ft lbs Boxes Per Case 50 Bullet Coating Nickel-Plated Rounds Per Box 20 Casing Material Nickel-Plated Aluminum Muzzle Velocity 2000 fps Unit Of Measure box