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 40 S&W Application Home Defense Bullet Type Lead Free Fragmenting Hollow Point Bullet Weight 60 gr Muzzle Energy 500 ft lbs Boxes Per Case 50 Bullet Coating Nickel-Plated Rounds Per Box 20 Casing Material Nickel-Plated Brass Muzzle Velocity 2000 fps Unit Of Measure box