Sierra Sports Master .380 ACP Features This 90-grain JHP ammunition offers a muzzle velocity of 990 fps and an energy output of 196 ft-lbs delivering powerful impact for personal defense. Packaged in a box of 20 this .380 ACP ammo balances penetration with expansion engineered to function reliably in a range of handguns. Sierra Sports Master .380 ACP Specifications Caliber: .380 ACP Bullet Weight: 90 grain Bullet Type: Jacketed Hollow Point (JHP) Case Material: Brass Muzzle Velocity: 990 fps Muzzle Energy: 196 ft-lbs Primer: Boxer Rounds per Box: 20