The 9mm Corto or 9x17mm happen to be the same dimensions (and pressure) of the 380 ACP. The only difference between the two are simply their names. Country of origin, manufacturer and history will usually change the way the cartridge is named. This 9x18mm ammo will be oversized and will not function in your pistol. Our selection of "380 ammo" will list the ammo your pistol.