There are a very few semi-auto pistols that shoot .357 magnum (not .357 Sig). While they will fire .38 Special, it is as a single shot- they will not cycle the action.
38 or 357
Yes
The ammunition is called .357 Sig. Most pistols in .357 Sig can shoot the .40 S&W when you drop in a .40 S&W barrel.
Yes, but please use the correct term- cartridges. Not bullets. A .38 Special is basically a .357 Short, and you can safely shoot .38 Special in a .357 magnum. The opposite is NOT true.
NO!!!!!!!!!!!!!!!!! DO NOT TRY THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Your gun is a 357 and can shoot both 357 ammo and 38 special ammo. The nice thing about these guns is you can practice at the range with 38S bullets, which are much cheaper, and save the 357 ammo for home defense.
No. Standard ammunition in the correct caliber for the gun. However, ONE of those calibers is the .357 SIG auto, and other .357 cartridges do not interchange with that.
No, there are .357 caliber bullets that are not magnum, but they are in the minority.
No, but a 38 special will work in a 357
There are a dozen different cartridges with 38 in their name, and SOME are compatible with the .357 Magnum. A .357 will fire .38 Special, .38 Short Colt, .38 Long Colt- but NOT .38 S&W.
No. A .357 Magnum revolver (not an automatic, lever action, or anything else with a headspaced chamber) can fire .38 S&W Special ammo, but not .38 Long Colt.