Wayner, The remingtons have been my favorite for many years now and have never found any of the problems you mention above and I bought my Remingtons and my 51 Colt from Cabelas. I did have to smooth up the action on them and other things that I did to them was something I would have done to any reproduction guns. Chamfered the loading ramps on them as well as the cylinder mouths, chamfered the the outside edge of the nipples on all four cylinders and the extra 24 nipples I have.Lightened the trigger pull and the hammer springs so that they run super smooth. Dovetailed front sights.
As I said above , not all of this was something that had to be done , just wanted them to be to my personal liking. I have four cylinders that I can switch between the two Remingtons and they all line up perfectly
When I ordered my Remington's I also ordered two extra parts kits for both of them and have never had to replace a part and I shoot them constantly.
This new 51 that I bought from Cabelas could not be any nicer for fit and finish but I have reduced the trigger pull and hammer spring. The sight on this gun is point on and I wont have to change a thing. I was told that they raised there sights on the newer one's and this may be the case on this one. Acording to the letters on it , it was built in 2005.
So far I have only fired about 150 rounds from the Navy but have had zero problems with and I have relieved some of the metal on the frame by the hammer and a few other things and that really helped cure the cap in the works problem common with open tops. This by no means makes me think that I won't have problems down the line, anything is possiable.
A friend of mine has two Uberti Remingtons and has a lot of problems with one and no problem with the other. We still had to smooth up the action on both of them and the finish on them was no any better than my Pietta's. He paid way more than me for nothing.
When I'm are buying a reproduction revolver I don't expect it to have chrome blueing and the finish of a Weatherby but as you pointed out you want things to line up and work right and maybe I was just lucky with the Pietta's I bought from Cabelas but if that's the case, then so are many other guy's on this site and many others who are very happy with there Revolvers from Cabelas.