Use only commercial grade ammunition in its original packaging that corresponds with the caliber of the gun. The correct caliber is imprinted on the gun. 45 caliber brass ball full metal jacket (FMJ) Never use reloaded, “refurbished”, hand-loaded, or non standard ammunition of a different caliber. Never use dirty, wet, corroded, bent, damaged, or oiled ammunition. Unfortunately, i... https://www.ammo2pistol.com/product/ati-fx45-1911/