Ammo Specifications Caliber: 5.56 NATO Bullet Weight: 75 gr. Product Line: Superformance Match H.I.T.S. # (100 Yard Value): 429 Ballistic Coefficient (G1): .395 Sectional Density: .214 Test Barrel Length (inches) 20 Quantity: 20 rounds Hornady Superformance Match 5.56 Ammunition achieves muzzle velocities of 100 200 fps faster than any conventional ammunition. Topped with the finest bullets, Hornady Superformance Match ammunition marries the very best cartridge cases with extremely stable propellants that are custom blended for each individual load to provide TRUE ammunition performance enhancement. Highpower competitors, as well as law enforcement and military shooters and snipers will all benefit from the Superformance Match advantage higher muzzle velocity, phenomenal accuracy, increased range and reduced wind drift. *Not for use in .223 chambers.