I haven't tried the 357 Sig but I have rechambered a couple of barrels to 356 TSW for a local customer that has a lot of ammo in that caliber. The only thing I can think of that will need to be addressed is that the breach face in the slide will also have to be opened up to accept the larger case head of the 357 Sig. Let me know how it works out for you.
Van Schneider
The Gunworks
Sandusky, OH
Ok, talked further with Van at Gunworks(he didn't realive it was me, he's helped me a lot with my experiments) I think were gonna use a 4006 slide and fit it to the 5906 frame. Project hopefully will start on Monday. I'll keep everyone posted.
They still have the ability to make the S&W barrels. I suspect that it would require a quantity purchase to make them spool up again. Maybe you could organize a group buy and make it worth their while?
Due to breech face size and magazine considerations , your better off using a 40XX series , then all you would need to do is find the appropriate barrel .