Any possibility the revolver was shipped with the wrong cylinder, inadvertently?
I ask, as being a recent purchaser of this particular revolver I did some research, (and someone with more knowledge please correct me if I am wrong here), and it appears the Dance revolvers as manufactured by Pietta, are simply their 1851 frame with a different barrel assembly and a shorter cylinder. I know on my own revolvers that the Dance cylinder is slightly shorter that that of my Pietta Colt reproductions.
I further read where a slight filing down of the rear of the barrel would result in the ability to fit a slightly longer .44 cylinder from other models (namely the 1860).
Seems a long shot that would be the problem, but thought I would throw it out there.
Have had no issues with mine so far. The action is smooth and seems well timed. It is a very nice handling .44 C&B revolver, on par or better than the 1860, but not quite as elegant visually.