What I was getting at is, you may want to test the chamber with a .32S&W before getting much deeper into it and make sure the diameters are the same. I tried a couple of different cases including a .32H&R mag just looking for brass to make shells from but most of it was too large in diameter to chamber in a .32RF. The chamber on mine is actually something like .300 or .308 if I remember right. It's my understanding that .32 colt either short or long will fit the rimfire chamber but it too is obsolete and hard to find.
Good luck
Good luck
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