Careful how you word that, 9mm shouldn't be fired in a .357/.38 Sp. cylinder, they are not interchangeable.
Very likely dangerous, I just removed the cylinder from my Blackhawk .357 and a 9mm drops right in with enough of a rim that somebody might try to fire it.
Very bad idea.
BTW, that Blackhawk .357 6 1/2" barrel is some kind of sweet!!




























