Doubletap Ammunition .50 Action Express 275 grain Solid Copper Hollow Point Brass Cased Pistol Ammo 20 Rounds. 50 Action Express 275 grain Solid Copper Hollow Point (SCHP) Brass Cased Pistol Ammunition: Manufacturer: Doubletap Ammunition Caliber: .50 Action Express Number of Rounds: 20 Bullet Type: Solid Copper Hollow Point (SCHP) Bullet Weight: 275 grain Muzzle Velocity: 1450 ft/s Package Type: Box Package Contents: Doubletap Ammunition .50 Action Express 275 grain Solid Copper Hollow Point (SCHP) Brass Cased Pistol Ammunition