.380 ACP, .38 special, and .25 ACP are also subsonic in their most commonly available rounds. As is .22LR as long as it is being shot out of a pistol (longer ba

.380 ACP, .38 special, and .25 ACP are also subsonic in their most commonly available rounds. As is .22LR as long as it is being shot out of a pistol (longer barrels will accelerate it past supersonic velocities, but almost all ammo is subsonic out of a pistol like a mark IV). According to this survey on guns used in crime, it is 9mm, followed by .40 S&W (a typically transonic round), and then .45ACP. https://oag.ca.gov/sites/all/files/agweb/pdfs/publications/firearms-report-16.pdf https://oag.ca.gov/sites/all/files/agweb/pdfs/publications/f...