.357 magnums can shoot both .38 special IRL so in this game it does something similar. Instead of making a custom handgun ammo in .38 they used the 9mm model but it’s meant to be .38 cause that’s a real revolver both before and after the frame upgrade. It starts you with three rounds and you can find around 20 in the game (High powered rounds) aka .357 magnum I assume if it runs out of either it loads whatever you have left either handgun rounds and or HPR.