The ARMSCOR SUBSONIC HP is a special cartridge for low-noise shooting. The bullet velocity stays distinctly below the sound barrier – there is no sonic boom, no loud crack! For this reason, this rimfire cartridge is very well suited for pest control. Less noise equals less disturbance of the game and environment, and more chance to take multiple shots. The hollow point bullet ensures rapid expansion, achieving a sure and reliable effect on small game and varmints. U.S. quality and consistent accuracy.