Underwood Ammo .460 Rowland 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo .460 Rowland 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: .460 Rowland Number of Rounds: 20 Bullet Type: Hard Cast Flat Nose (HCFN) Bullet Weight: 255 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1300 ft/s Muzzle Energy: 957 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Dimensions: 1.45 X 2.70 X 3.20 in Package Contents: Underwood Ammo .460 Rowland 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 629: .460 Rowland 255 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds