Hornady has partnered with the Lake City Army Ammunition Plant to bring you Frontier ammo. Frontier is American Made and Military Grade ammunition that is optimized for consistent reliable performance in today's modern sporting rifles. This load uses brass casings with military-grade boxer primers and propellants to ensure proper feeding and ignition with every shot. Affordable and dependable, you know that you can rely on Hornady Frontier when every shot counts! Specifications: Hornady Frontier FR320 5.56 NATO 75 Grain Hornady Boat Tail Hollow Point Match Grade Projectile Reloadable brass case Test barrel 20" Muzzle velocity 2860 fps Velocity at 100 yards 2603 fps Velocity at 300 yards 2130 fps Velocity at 500 yards 1712 fps Muzzle energy 1362 ft/lbs Energy at 100 yards 1128 ft/lbs Energy at 300 yards 756 ft/lbs Energy at 500 yards 488 ft/lbs Use for target shooting, competition and hunting