Doubletap Ammunition Colt Defense .223 Remington 62 grain Solid Copper 20 Rounds Rifle Ammo. Quick follow up shots are easy along with 16.0" of penetration and .75" of expansion Specifications for Doubletap Ammunition Colt Defense .223 Remington 62 grain Solid Copper Rifle Ammunition: Manufacturer: Doubletap Ammunition Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Solid Copper Bullet Weight: 62 grain Features of Doubletap Ammunition Colt Defense .223 Remington 62 grain Solid Copper Rifle Ammunition: Caliber : 10mm Bullet : 180gr. Jacketed Hollow Point Ballistics : 1150 / 529 ft/lbs. - 5.0" bbl Glock 29 - 1100fps Package Contents: Doubletap Ammunition Colt Defense .223 Remington 62 grain Solid Copper Rifle Ammunition