This is not as easy a question as some make it out. Not all 7.62 Tokarev is loaded to the same pressure, neither is all 7.63 Mauser. If you look at enough published tests, you will see that there is significant overlap of the two flavors of the same cartridge. And FWIW, ALL 7.62 Tokarev ammo was loaded for use in both pistols and SMGs...there is no such thing as HOT SMG-ONLY Tokarev ammo. The problem stems from the sorry condition that many Mauser pistols reached this continent in from China. With that said, you should have a qualified 'smith look over your Mauser pistol to see if it is actually shootable, and replace all the springs. If it passes all the tests, it should actually be fine for almost any variety of Tokarev or Mauser ammo you find. Three exceptions to avoid are Czech M48, commercial S&B Tokarev, and Winchester Tokarev. All came out of the Czech S&B factory and are loaded exceptionally hot.