I picked up this 3906 last summer from a collection and was never fired.
I have shot the heck out of since then and I agree that it will feed anything, in fact I put a 9mm in backward and it fired and fed the next round.
Ok I might be pushing the level of truth but it’s reliable. My only negative comment is on the sharp lines around the trigger guard.
Around the magazine release its sharp enough you could shave with. You can see the polished edge on the frame above the trigger that one helped a lot. As little as I paid for it I will be doing my first trigger job on it. Just polishing.