I have a Uberti 1873. After I cleaned my rifle I went to the range, my cartridge jammed on first attempted shot. After removing cartridge, I found that the action worked perfectly until I loaded a cartridge. The cartridge wouldn’t feed into the barrel more that 2/3 of the way. I thought it was the mechanism, but when I tried to feed the cartridge by hand with no mechanism connected, the cartridge stuck the same way. I inspected the barrel and could not see anything block it’s path. Any help would be most appreciated.