Underwood 458 HAMR Ammo 300 Grain Hornady Interlock Jacketed Hollow Point Box of 20

They utilize Hornady InterLock which is designed to be a devastating hunting bullet and nothing less. The InterLock Ring - a Hornady exclusive - ensures that the core and jacket remain locked during expansion. The InterLock retains more mass, energy and momentum after impact and transfers that energy to the target. Its reliable stopping power has earned the InterLock a worldwide reputation as a bullet for serious hunters. As with all of Underwood Ammo rounds, they utilize flash suppressed powder