Great Videos - Well Done!
Years ago I began accumulating cap & ball revolvers whenever on sale, from Cabelas. One thing in common to both Pietta & Uberti was the non-uniformity and poor finishing of their nipple manufacturing. Used to joke about some drunken Granny seated at a foot-pedal grinder, who was cranking them out without regard for uniform dimensions. Installing Treso/Ampco nipples eliminated all ignition and cap fit problems. I accumulated a good inventory of factory nipples, and was able to sort a couple of sets them into same dimensions to fit spare cylinders I purchased. When sorted into like groups, I've had no further problems with cap fit or ignition. I use #11 caps for the Treso/Ampco nipples, and #10's for my sorted factory sets.
It's interesting to note that when Granny was younger, she made better factory nipples. The Replica Arms/Uberti 1861 Navy Dad bought back in 1968 has always worked fine with its' factory nipples & the tapered cone section was finished smoother & without any machine marks on it.
Nevertheless, I've found that the Treso/Ampco nipples are the finest you can install.