Doubletap Ammunition Colt National Match .223 Remington 62 grain Full Metal Jacket 50 Rounds Pistol Ammo. This one is as good as it gets Specifications for Doubletap Ammunition Colt National Match .223 Remington 62 grain Full Metal Jacket Pistol Ammunition: Manufacturer: Doubletap Ammunition Caliber: .223 Remington Number of Rounds: 50 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 62 grain Cartridge Case Material: Brass Application: Competition Match Package Contents: Doubletap Ammunition Colt National Match .223 Remington 62 grain Full Metal Jacket Pistol Ammunition What is Doubletap Ammunition Colt National Match .223 Remington 62 grain Full Metal Jacket Pistol Ammunition good for? The manufacturer says that it is good for match competition.