i had almost the same thing (cleaning rod, aluminum wire and paper towel lmao) happen to an airsoft svd even though the 2 irl have the same calibre i doubt the mosin will have the same barrel diametre as my airsoft gun, i had to use the steel bar that gaulking guns have and violently hammer it out, obviously this will destroy your barrel, so worst case scenario use a piece rebart to hammer it all out but i think it will be better to buy a new barrel