Product Description 5.56 NATO 55 Grain Full Metal Jacket Brass Cased Reloadable Boxer Primed Non-Corrosive 55 Grain Full Metal Jacket Muzzle Velocity 3270fps Muzzle Energy 1306ft/lbs 300 Rounds Polymer Ammo Can Other Details Case Pack: Loose Compliance Item Type: Rifle Ammo Brand: Winchester CA Prop 65: Yes Allocated Item?: No Package/Packing: Can Energy: 1306 ft-lbs Reloadable Case: Yes Primer: Boxer Case Material: Brass Lead Free: No Velocity: 3270 fps Bullet Type: FMJ Caliber: 5.56mm Brand Family: XM193 Available Drop Ship Delivery Options: ground Boxes Per Case: 1 Grain: 55 gr Rounds: 300