PMC Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT. 56 NATO 55 gr Full Metal Jacket Boat Tail (FMJBT) 200 - PMC Battle Packs are built to take a beating to keep your PMC Ammunition safe and secure. PMC Battle Packs are vacuum-sealed and wrapped in a high density advanced polymer sleeve. Inside of the Battle Packs ammo is packaged in regular PMC boxes so 10 boxes of 20 for a total of 200 in each 223A and 5.56X Battle Pack. Specifications for PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail (FMJBT): Manufacturer: PMC Ammunition Caliber: 5.56x45mm NATO Number of Rounds: 200 Bullet Type: Full Metal Jacket Boat Tail (FMJBT) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Velocity: 3270 ft/s Muzzle Energy: 1306 ft-lbs Application: Protection Primer Style: Centerfire Package Contents: PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail (FMJBT) 200 What is PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail (FMJBT) good for? The manufacturer says that it is good for protection.PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT 200