Hard Core. Designed for military applications, M855 features a copper-jacketed steel point and lead core. The steel point prevents deformation allowing the round to penetrate deeper before fragmentation or tumbling occurs. 300 rounds per box. M855 is often called "green tip" ammo. The tip of the projectile is marked green to denote a steel "penetrator" in the lead core. This type of ammo is often prohibited for use at indoor shooting ranges. Specifications for Aguila Ammunition 5.56x45mm NATO 62 Grain Green Tipped Full Metal Jacket Brass Cased Centerfire Rifle Ammunition: Manufacturer: Aguila Ammunition Cartridge: 5.56x45mm NATO Number of Rounds: 300 Bullet Type: Full Metal Jacket Boat Tail (FMJBT) Bullet Weight: 62 grain Cartridge Case Material: Brass Muzzle Velocity: 3215 ft/s Muzzle Energy: 1298 ft-lbs Application: Target Package Type: Box Primer Style: Centerfire Dimensions: 5.30 X 5.25 X 5.65 in Length: 5.65 in Package Contents: Aguila Ammunition 5.56x45mm NATO 62 Grain Green Tipped Full Metal Jacket Brass Cased Centerfire Rifle Ammunition