Funny I bought an 1851 pietta at the pawn shop a couple months ago and read up, took it completely apart cleaned it up real good, it was trashed. It spun freely at half cock(not a spin but moved) locked where it should at full, had to sand the nipples. I finally went and shot it yesterday first 3 or 4 rounds shot great( i literally loaded one load shot one load just to get used to it) on the fifth shot when I went to full cock the cylinder didn't move I manually moved it fired the shot then played with the pistol. It would move on five of the six cylinders but not the sixth. I turned it barrel up gave it a good whack on the table and it worked. Fired 3 more shots and same thing. Old timer(I mean this VERY respectfully) next to me said looked like a cap got in the action. I didn't have time to clean it will do that today and take it apart. Apparently this is common in the Pietta and Umberti clones due to the hammer sight splitting the caps and apparently they are supposed to help remove them. I watched a video where a guy jb welded the sight closed and it got rid of the problem, but that takes the sights away, he didn't call them a sight he called it a cap remover. Either way you probably made the right decision especially if you never fired them, me I like to try and fix it myself because I hate not having something, probably not the best idea all the time, but mine's a pawn shop special made in 2007 there is no sending it in, that and it was only $100.