Federal Personal Defense HST 9mm Luger +P 124gr Jacketed Hollow Point Centerfire Handgun Ammo - 20 Rounds - Effective self-defense requires ammunition that provides consistent expansion, optimum penetration and superior terminal performance. And HST delivers. That's why it's already the duty load of choice for law enforcement officers throughout the world. Its specially designed hollow point won't plug while passing through a variety of barriers, and the bullet jacket and core hold together to provide nearly 100 percent weight retention through even the toughest materials.