Atomic Ammunition Defense .45 Colt 250grain Jacketed Hollow Point Brass Cased Pistol Ammo 50 Rounds. Assembled to exact specifications with commercial grade machinery Atomic Ammunitionis designed to deliver the accuracy that precision shooters demand and do it all at a price that you can afford. Specifications for Atomic Ammunition Defense .45 Colt 250grain Jacketed Hollow Point Brass Cased Pistol Ammunition: Manufacturer: Atomic Ammunition Caliber: .45 Colt Number of Rounds: 50 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 250 grain Cartridge Case Material: Brass Muzzle Velocity: 800 ft/s Muzzle Energy: 355 ft-lbs Application: Self-Defense Primer Style: Centerfire Dimensions: 1.80 X 2.85 X 5.80 in Package Contents: Atomic Ammunition Defense .45 Colt 250grain Jacketed Hollow Point Brass Cased Pistol Ammunition What is Atomic Ammunition Defense .45 Colt 250grain Jacketed Hollow Point Brass Cased Pistol Ammunition good for? The manufacturer suggests that it is best for self-defense.Atomic Ammunition CART-45CLT-250GR-DEF: Defense .45 Colt 250grain Jacketed Hollow Point Brass Cased Pistol Ammo 50 Rounds