Super Vel's "Certified Select" Training Ammo is re-manufactured with once-fired U.S. military brass casings that we source directly from U.S. military bases. This .223 Rem. load features a 55 gr. FMJ bullet at a nominal 3,050 fps which is a standard pressure .223 Rem load. This cartridge can be safely fired in rifles marked 5.56 NATO. Ideal for training, "Certified Select" is made using the same machines and quality control as our regular production ammunition.