This is .223 PMC Bronze 55gr. Full Metal Jacket Ammo. This is newly manufactured ammo. This ammunition is manufactured to Mil-Spec M-193 Spec's. The muzzle velocity is a blistering 3200fps and the energy is a powerful 1250ft-lbs. It has boxer primed reloadable brass cases, non-corrosive sealed primers and annealed case necks. It also contains precision-made all copper-jacketed boattail bullets which provides tight-grouping accuracy at a reasonable price. This ammo is non-magnetic. It comes packed in 20rd. boxes.