I lucked onto a Colt 1878 a little over a month ago. I never thought I'd see one outside a museum or a picture online let alone own one. It had been someone's project gun that still had issues. I have made a couple of parts and have it up and running. The numbers are all matching on the metal parts. It is an earlier model without the doll's head on the barrels.
The buttstock has been replaced with a nice piece of figured walnut but the forend wood is really worn this winter I plan to replace the forend wood and correct some features of the buttstock that are not like the original and checker it. (I use to do a passably good job of checkering 40 years ago.)
Yes, I have shot it and will shoot it this Saturday at our local match. My loads are light loads of BlackMZ in brass hulls.