Performance of 300 Blackout Subsonic meets or exceeds FBI Protocol terminal ballistic test requirements. The XTP® bullet in Subsonic Handgun has built a world-class reputation for accuracy and stopping power. Hornady® Subsonic Ammunition doesn’t have the loud report of a supersonic round, and paired with a suppressor, it’s even quieter. Unique powders optimized for subsonic use result in a low flash signature, ideal for either suppressed or unsuppressed performance. With high-quality cartridge cases and primers, Subsonic Ammunition offers the performance and accuracy shooters have come to expect from Hornady.