I looked at a Texas Brush Popper by Cimarron Arms the other day, 45LC, I was impressed by fit and finish. I know a couple of guys that shoot Navy Arms Winchester repops and they don't have any problems with them, parts are readily available. The new Winchesters and Brownings are made in Japan, some of the changes made don't lend them shooting lead bullets very well they have too fast a pitch designed for jacketed bullets. The Browning BPCR has a barrel made by an American company called Badger, it has the proper twist for black powder, cast lead bullets and shoots very nicely in 45-70 or 45-90. I shoot a couple vintage lever action rifles but keep my loadings to smokeless and within the safe limits of the rifle, the 1886 is a very strong action and handles smokeless loads very well as long as you use lead bullets, the steel was not proofed until the 20's and is mild enough that even a jacketed bullet will cause significant wear in time.
Pedersoli does very nice work, I know guys that shoot black powder through them and never have any problems. I have a couple of Remington pistols that are made by Uberti, no problems, keep them clean and have fun.