Underwood Ammo .50 Action Express 325 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo .50 Action Express 325 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: .50 Action Express Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 325 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1475 ft/s Muzzle Energy: 1570 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Dimensions: 1.75 X 2.65 X 3.20 in Height: 1.75 in Package Contents: Underwood Ammo .50 Action Express 325 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 515: .50 Action Express 325 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo 20 Rounds