Description Hornady Subsonic Ammunition is designed for accuracy and performance below the speed of sound. Subsonic Handgun utilizes tried-and-true XTP bullets that expand reliably at subsonic velocities. This model is a 147 gr XTP 9mm Luger and includes 25 rounds per box. Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.