Mauser made a few model 30 pistols in a round called 9mm Mauser Export. It was almost as hot as a .357 Magnum. With a new bolt stop the gun should be good for .38ACP with that in mind. Astra also made some of theirs for 9mm Largo. I would get a reloading book or Cartridges of The World book and look up whatever information I could find on those cartridges.
Keep in mind that the gun is 70-80 years old and would reflect the metalurgy of the time. If you want to shoot hot loads, get a Ruger Blackhawk.
Unfortunaltly a couple of years back I passed on a chance to buy one in 9mm Export. I have rgretted it since.
Steve
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