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. Features: Specially designed hollow point expands reliably through a variety of barriers Expanded diameter and weight retention produce the desired penetration for personal defense situations without over penetrating Superior performance in FBI test protocol used by law enforcement officials to assess and select duty ammunition Bullet nose profile, nickel-plated case and high-performance primer provide the ultimate in function and reliability in semi-automatic handguns