Cleaned my 1860 colt Pietta and put it in a cloth case. Unfortunately, I did not notice it was very wet, as I had grabbed it and the oil rag together. set them down for a few weeks, came back to some rust where the cylinder meets the barrel on the base pin. so, soaked in oil, as they were fairly gunked. got all apart, cleaned and not a bit of rust to be seen. Now though the cylinder and the barrel do not want to go back on the pin. They slide on my other 1860 colt just fine. I seriously see no rust and all is lubed well.
Thoughts? before I do a touch of sanding to the end of the pin.