I can't get a round to feed and then chamber in this antique 45-70 Winchester 1886. Magazine, cartridge stop, and lifter work fine. Round makes it about into the chamber as you see it and then jams and the cartridge base refuses to jump up and get in line with the bore axis. No reasonable amount of hand pressure on the lever will budge it. Gun letters as a 45-70 but I can't say if the bbl is original. I didnt look at it closely before sending it off to Turnbull for restoration but since they didnt do the barrel work they didnt flag this problem.
Although I only shoot trapdoor reloads with hard cast lead boolits in old 45-70s (they are more than enough for the deer around here), the round in the photo is a Remington green box with a flat nose but fairly rounded sides and enough of a crimp that should feed about as smooth as any from a levergun. The edge of the chamber mouth looks kind of sharp. Would a simple polishing with emory paper be in order? Its a takedown rifle so no problem with access.
Gun fires and ejects fine when loaded as a single shot.