I had one that I bought new back in the early 70's. It came with two barrels, one in .32 acp and another in .380 acp. Nothing was required to convert between the two calibers but to swap out the barrels. The magazine would hold either caliber. The thing seemed like a really solid well bulilt little gun, but it was a terrible jam-o-matic. I used only ball ammunition and tried several different brands without success. I finally gave up on it and traded it for a Beretta Model 84 back in the late 80's. The Beretta is perfect in every way, so I don't miss the Mauser at all.
The WWII versions of the HsC made in the '30's & '40's are suppossed to be better quality and are more reliable.
Fear is a reaction..........Courage is a decision