The French built a nice compact SMG in the same .32 long chambering.
From what I have read the .32 ACP rim is very different, and could cause an extractor failure and/or breakage.
Never had a problem with the extractor but it did bugger the hole for the loaded chamber indicator pin.
I did not use a insert in chamber or magazine, but so long as I loaded the mag with no more than six .32 ACP the pistol cycled just fine. The .32 ACP rounds hit so far to the left I'd have never been able to sight it in with that cartridge.
I actually gave that pistol away to a friend who admired it. I don't know if he ever found rounds for it.