This is true military Q3130 Winchester .308 / 7.62x51mm Nato Spec. 147gr. Full Metal Jacket Ammo. It is headstamped WCC 10 with the NATO cross. It is brass cased, boxer primed and non-corrosive. It has an annealed case mouth and a crimped primer. It comes in a Winchester white box that is labeled 7.62. The Winchester item number is Q3130. This is Winchester's military grade ammo, NOT their commercial ammo. It comes packed in 20rd. boxes.