PMC Ammunition X-Tac Rifle Ammo 5.56x45mm 55 gr FMJBT 3120 fps 1000/Box 5.56X Case. The line is designed with recreational shooters in mind due to its affordability. Specifications for PMC Ammunition X-Tac Rifle Ammunition 5.56x45mm 55 gr FMJBT 3120 fps: Manufacturer: PMC Ammunition Caliber: 5.56x45mm NATO Number of Rounds: 1000 Bullet Type: Full Metal Jacket Boat Tail (FMJBT) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Velocity: 3120 ft/s Muzzle Energy: 1189 ft-lbs Application: Predator Hog Deer Self-Defense Training Target Varmint Package Type: Case Included Accessories: None Primer Style: Centerfire Gun Type: Rifle Package Contents: PMC Ammunition X-Tac Rifle Ammunition 5.56x45mm 55 gr FMJBT 3120 fps What is PMC Ammunition X-Tac Rifle Ammunition 5.56x45mm 55 gr FMJBT 3120 fps good for? The manufacturer suggests that it is best for training self-defense deer hog predator.PMC Ammunition 5.56X Case: X-Tac Rifle Ammo 5.56x45mm 55 gr FMJBT 3120 fps 1000/Box