Underwood Ammo 10mm Auto 180 Grain XTP Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo 10mm Auto 180 Grain XTP Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 180 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1300 ft/s Muzzle Energy: 676 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Underwood Ammo 10mm Auto 180 Grain XTP Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 243: 10mm Auto 180 Grain XTP Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo 20 Rounds