Once upon a time I had a 4 5/8th" Blackhawk in .45 Colt. If I had had bothered to order a convertible rather than impulse buy the one in the case or send the gun off to have an ACP cylinder fitted I'd still have it. As it is I'm hoping I win the GB auction for an unfluted 3.75" bisley Blackhawk. That should be a lot of fun.
Last weekend I took out my 5" S&W 625 in .45 ACP. I love shooting that thing. Needs better sights though.