I have only one big bore revolver: Freedom Arms M83 Premier Grade in .454 Casull, 6" barrel. Big enough to get some performance out of the round but still compact enough to be a holster gun with a good belt.

I did have FA perform an action job, install a set screw for over travel, and fit a spare cylinder in .45 ACP. The .45 ACP cylinder is fun to shoot, and despite the long cylinder throats is very accurate; 1" groups or less at 25yds off the bench are possible with some loads with the .45 ACP cylinder. The .454 cylinder is a bit more precise than that when I can do my part. Seems to favor 300-335gr bullets, 360gr pills open up a bit but are still usefully accurate though.