Introducing the Wolf Military Classic Steel Case 6.5 Grendel Ammo 100 Grain Full Metal Jacket. Wolf ammunition features a bi-metal bullet and steel case to provide an inexpensive option for high volume shooters. The Bi-Metal bullet consists of a lead core and a copper plated steel jacket. This affordable ammunition is loaded with high quality Wolf primers for reliable ignition and functioning in adverse conditions. This ammunition is new production, non-corrosive, in non-reloadable steel cases.