I bet there's more people that's tried it than cares to admit to it. I used to practice the barrels to grips fast swap that Eastwood did in Jose Wales (the one where they wanted Jose Wales to move his hands slower than molasses in winter so they could count them there hairs on his hands), in the scene in the out post with the Indian squall about to get raped by "those pilgrims that owned them there horses" as Jose Wales called them. I just never got as fast as a two headed rattle snake or twice as mean with my revolvers as Jose Wales was, as those pilgrims said.
Jose..spits baccer juice..........buzzards gotta eat same as the worms...............I reckon so.
Tried it once, determined that Tom Mix was a hell of a lot better shot than I am, decided never to do it again and have stuck to that decision ... 1911 in right hand was ok, snubbie in my left was a danger to all ...