Underwood Ammo .500 S&W Magnum 700 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo .500 S&W Magnum 700 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: .500 S&W Magnum Number of Rounds: 20 Bullet Type: Hard Cast Flat Nose (HCFN) Bullet Weight: 700 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1000 ft/s Muzzle Energy: 2239 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Dimensions: 2.50 X 2.55 X 3.35 in Width: 2.55 in Length: 3.35 in Package Contents: Underwood Ammo .500 S&W Magnum 700 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 741: .500 S&W Magnum 700 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds