Hornady’s Subsonic Ammunition is designed for accuracy and performance below the speed of sound. Available in both rifle and handgun calibers, the Subsonic Cartridges feature unique powders optimized for subsonic use result in a low flash signature, ideal for either suppressed or unsuppressed performance. The handgun rounds use the renowned XTP bullets that expand reliably at subsonic velocities, while the rifle rounds use Sub-X bullet with a lead core. Long grooves in its gilding metal jacket combine with the bullet’s flat profile and the patented Flex Tip insert within its hollowpoint cavity to help it expand reliably at low velocities. Features of Hornady’s Subsonic Ammunition: Unique powders optimized for subsonic Low flash signature Available in rifle and handgun calibers Hornady Subsonic .300 BLK 190gr Ammunition w/SUB-X Bullets (20/Box) 80877