Hornady GMX Bullets 30 Caliber (308 Diameter) 150 Grain GMX Boat Tail Lead-Free (50pk)Hard hitting and deep penetrating, the Hornady GMX bullet combines monolithic construction with pioneering ballistic design to meet the need for a premium, non traditional bullet. The mono metal design of the GMX bullet is crafted from a copper alloy. Harder than solid copper, the copper zinc alloy has been proven to shoot cleaner, foul less, and deliver consistent, even pressure curves. The tough alloy material routinely retains 95% or more of its