Hornady Subsonic Ammunition designed for accuracy and performance below the speed of sound now comes in both rifle and handgun loads. Subsonic Handgun utilizes triedandtrue XTP bullets that expand reliably at subsonic velocities. The SubX bullet used in Subsonic Rifle features a Firearm Ammunition core. Long grooves in its gilding metal jacket combine with the bullets flat profile and the patented Flex Tip 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.