Winchester - Full Metal Jacket - 55 Grain 5.56x45mm Ammo - 600 Rounds

Is your AR-15 running on empty? Say it ain’t so! And order this 600-round case of 5.56x45 ammunition by Winchester while you’re at it. It’s just stuff you need to stay at the range long enough to perfect your aim (or avoid your sister-in-law’s upcoming birthday party).

This cartridge’s 55 grain full metal jacket bullet will not attract a magnet, so it’s primed and ready for target shooting at ranges which prohibit magnetic ammo. The bullet’s lead core is wrapped in a copper alloy jacket, with a toothed cannelure in its midsection to help prevent setback in the magazine. The bullet’s weight and 3,180 fps muzzle velocity give it a 0.250 G1 ballistic coefficient, which translates to the flat trajectory we all know and love the 5.56 for.

Winchester recently produced this non-corrosive ammo for the commercial market, but it still has military grade components. The most noticeable among these are the ammo’s brass cases, which possess cosmetic discoloration around their mouths. That gray color is the harmless byproduct of heat-treatment – it will not impact performance or reloadability.