The Hornady FMJ Bullets - 223 62gr is a pack of 100 bullets ideal for reloading 223 and similar calibres. Full metal jacket (FMJ) bullets consist of a soft core (lead) encased in a shell of harder metal (often gilding), this improves feeding and the reason for the FMJ design. Boat Tail bullets are less sensitive to crosswinds, have a flatter trajectory, retain higher velocity downrange and deliver higher energy to the target in comparison to their flat base equivalents