Just curious as to why you'd want to. I've never been a big fan of the .40, just because I don't see that it'll do any thing a 9mm or .45 won't except cost more for ammo. That said, it seems to be good caliber. What will .357 do that .40 won't without putting a "maybe" mod in your gun?
FQ13 who is more curious than making an arguement