When I do open carry, which is very rare, it's either my Kimber Custom TLE II in .45 ACP or my S & W Model 65 in .357 Mag. with the Smith having a very slight edge.
I'd only open carry a unloaded S&W revolver for dress up reason (if I wanna look like a cowboy). If I'm serious, I'd also conceal carry a loaded semi-auto.
I don't want the bad guys to see I have a gun and know to shoot at me first.