Underwood Ammo Xtreme Defense Features The Underwood Ammo Xtreme Defense in .380 ACP +P uses an optimized nose flute on its solid monolithic copper bullet to achieve penetration depths up to 18 inches while creating a permanent wound cavity far larger than typical expanding bullets. That flute geometry keeps the bullet performing consistently even after passing through barriers like wallboard sheet metal or automotive glass an important trait for a compact carry cartridge. Because the solid copper bullet does not rely on hollow point expansion it delivers dependable terminal performance that traditional jacketed bullets cannot always guarantee. At 1400 fps and 296 ft lbs of energy this load hits hard for a lightweight lead free .380 ACP round. Nickel plated brass casings give this ammunition several practical advantages over standard brass starting with improved feeding across compact pistol actions. The plating also boosts corrosion resistance keeps cases looking sharp in storage and simplifies cleanup for reloaders who reuse the brass. Nickel plating resists tarnish even after contact with leather moisture or other metals during extended carry an important trait for ammunition that lives in a pocket pistol day after day. Packed 20 rounds to a box the Underwood Ammo Xtreme Defense gives .380 ACP shooters top tier performance from a compact everyday carry pistol. Underwood Ammo Xtreme Defense Specifications Manufacturer: Underwood Ammo Model: Xtreme Defense Caliber: .380 ACP Rounds Per Box: 20 Casing Material: Nickel-Plated Brass Bullet Weight: 68 gr Bullet Type: Solid Monolithic Muzzle Velocity: 1400 fps Muzzle Energy: 296 ft lbs Rating: +P Available At: GrabAGun