Hornady Subsonic Ammunition - designed for accuracy and performance below the speed of sound - now comes in both rifle and handgun loads. Subsonic Handgun utilizes tried-and-true XTPA(R) bullets that expand reliably at subsonic velocities. The Sub-X bullet used in Subsonic Rifle features a lead core. Long grooves in its gilding metal jacket combine with the bullet's flat profile and the patented Flex TipA(R) insert within its hollowpoint cavity to help it expand reliably at low velocities. Powders are selected for optimal performance and consistency from lot to lot. Product Features PROVEN PERFORMANCE Performance of 300 Blackout Subsonic meets or ex Mfg: Hornady