Federal Premium Personal Defense Punch 10mm Auto 200 Grain Jacketed Hollow Point Nickel Plated Brass Cased Centerfire Pistol Ammo 20 Rounds. The bullet's skived jacket and soft lead core produce the best expansion and penetration for the price while its nickel-plated brass and sealed primer deliver the reliable feeding and ignition you need to protect yourself. Specifications for Federal Premium Personal Defense Punch 10mm Auto 200 Grain Jacketed Hollow Point Nickel Plated Brass Cased Centerfire Pistol Ammunition: Manufacturer: Federal Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 200 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1100 ft/s Muzzle Energy: 537 ft-lbs Application: Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Gun Type: Handgun Package Contents: Federal Premium Personal Defense Punch 10mm Auto 200 Grain Jacketed Hollow Point Nickel Plated Brass Cased Centerfire Pistol Ammunition Federal PD10P1: Premium Personal Defense Punch 10mm Auto 200 Grain Jacketed Hollow Point Nickel Plated Brass Cased Centerfire Pistol Ammo 20 Rounds