Underwood Ammo .45 Super 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo .45 Super 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: .45 Super Number of Rounds: 20 Bullet Type: Hard Cast Flat Nose (HCFN) Bullet Weight: 255 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1075 ft/s Muzzle Energy: 654 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Underwood Ammo .45 Super 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 728: .45 Super 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds