This PMC Ammunition X-TAC 5.56 55 Grain FMJ Brass Case Boat Tail packs some of the most reliable rifle rounds you can find. PMC Ammunition designed this .223 / 5.56 NATO Ammo with a boat tail design that results in improved accuracy and more stable flight path which is perfect for competitive marksmen or even hunters looking to pull off longer distance shots on prey. To further improve bullet trajectory and long-distance accuracy, the PMC Ammunition X-TAC 5.56 55gr FMJ Boat Tail Ammo sports an impressive 3,270 fps of muzzle velocity. When your shots land, they'll do significant damage with a whopping 1,306 ft/lb. of muzzle energy. Bring out the PMC Ammunition X-TAC 5.56 NATO FMJ-BT when you need premium precision that won't let you down. Specifications for PMC Ammunition X-TAC 5.56x45mm NATO 55 grain Full Metal Jacket (FMJ) Brass Centerfire Rifle Ammunition: Manufacturer: PMC Ammunition Cartridge: 5.56x45mm NATO Number of Rounds: 20 Bullet Type: Full Metal Jacket Boat Tail (FMJBT) Bullet Weight: 56 grain Cartridge Case Material: Brass Muzzle Velocity: 3270 ft/s Muzzle Energy: 1306 ft-lbs Application: Target Package Type: Box Primer Style: Centerfire Sectional Density: 0.156 G1 Ballistic Coefficient: 0.243 Lead Free: No Features of PMC Ammunition X-TAC 5.56 55 Grain FMJ Brass Case Boat Tail: Velocity: 3720 FPS Kinetic Energy: 1306 ft/lb. Ballistic Coefficient: 0.243 Package Contents: PMC X-TAC 5.56mm NATO 55 Grain FMJ Boat Tail Ammunition