This is 40 S&W Federal Law Enforcement Tactical HST 155gr. Hollow Point Ammo. This is the next generation in high performance Defense ammunition. The Tactical HST Hollow Point Ammo offers consistent expansion and optimum penetration for terminal performance. A specially designed hollow point tip won’t plug while passing through a variety of barriers and this bullet holds its jacket in the toughest conditions. The HST Hollow Point is engineered for 100% weight retention and extremely impressive expansion—it’s the ammunition you’ve been waiting for. This ammo is extremely hard for us to get and we have limited supplies. This is current production ammo and it is packed in 50rd. boxes.