5.56x45mm – 70 gr GMX – Black Hills (D556N3) – 500 Rounds

AR-15 owners who hunt deer and hogs need a 5.56 bullet that holds together and penetrates, and many also need it to be lead free. This listing is Black Hills 5.56x45mm NATO 70 grain GMX ammo, MPN D556N3, sold as 500 rounds for ranchers controlling hogs, hunters in lead restricted areas, and rifle owners who want a single, dependable expanding load.

The GMX is a monolithic bullet made without a lead core, with a polymer tip that starts expansion on impact. Because the entire bullet is one piece of copper alloy, it cannot separate from a jacket, so it typically retains most of its weight and penetrates deeply. That combination is what lets a small 22 caliber bullet perform on deer sized animals. The heavier 70 grain weight gives this load more momentum than common lighter hunting bullets. It is a hunting load, not a target or match round.

This ammunition fits rifles chambered in 5.56x45mm NATO and 223 Wylde, including AR-15 rifles from Ruger, Smith and Wesson, Daniel Defense, Colt, and Aero Precision, as well as the Ruger Mini-14 Ranch, FN SCAR 16S, and IWI Tavor. A common question is what twist rate a 70 grain monolithic bullet needs. Copper bullets are longer than lead core bullets of the same weight, so a fast twist of 1:7 or 1:8 is the safe choice, and slow 1:12 barrels will not stabilize it. Another common question is whether 5.56 is legal for deer. Many states allow it while some set a minimum caliber, so check your state regulations before the season.

Black Hills D556N3 is new production ammunition, not reloads, made in Rapid City, South Dakota. It uses reloadable boxer-primed brass cases and non-corrosive primers. This listing contains 500 rounds from one lot, a supply that covers zeroing, field practice, and several seasons of hunting with a single, consistent load.