VALUE PACK - CASE QUANTITY - 1000 ROUNDS, packed as 50 boxes of 20 rounds. 55gr 5.56 NATO FMJ-BT ammo from PMC Ammunition. MPN 5.56X Bullet Type: FMJ-BT Weight: 55 grain Velocity (feet per second) Muzzle: 3270 100 Yds: 2898 200 Yds: 2555 300 Yds: 2237 400 Yds: 1943 500 Yds: 1674 Energy (foot-pounds) Muzzle: 1306 Bullet Path (inches) Muzzle: -1.50 100 Yds: 0 200 Yds: -2.6 300 Yds: -10.6 400 Yds: -25.6 500 Yds: -49.9 Ballistic Coefficient 0.243 Bullet Length 0.740 Sectional Density 0.156 Ammo may be shipped in the original manufactures cardboard or repacked depending on availability, and what's needed for safe shipment.