Atomic Ammunition's 380 ACP ammunition is designed to hit hard, expand to 150 percent of its original diameter even if fired through heavy clothing, and still penetrate 12 inches or more of ballistic medium and all when fired from a small, concealed carry-sized pistol. It is assembled to exact specifications with commercial-grade machinery and is designed to deliver the accuracy that precision shooters demand. Specifications: 380 ACP/90 gr/Hollow Point (HP)/20 Per Box/10 Cs Series Precision Craft Caliber 380 ACP Application Home Defense Bullet Type Hollow Point Bullet Weight 90 gr Muzzle Energy 241 ft lbs Boxes Per Case 10 Rounds Per Box 20 Casing Material Nickel-Plated Brass Muzzle Velocity 1100 fps Unit Of Measure box