If this isn't deja vu all over again....
A couple of months ago I bought a used renegade for a great price thru an online auction. When I received it, I found that there was a load still in the barrel... about 4 inches up from the breech end so it was really easy to tell. Pulled the breech plug and found it plugged solid with solidified pyrodex that had turned a rust red color! So, I soaked the breech end in water and picked away until I got most of the pyrodex out and could see the base of the bullet... a saboted round. Sprayed WD40 down the muzzle end to prepare for a bullet pulling. Screwed into the projectile with my t-handled steel range rod, stood on the handle with both feet, wrapped the barrel with an old towel and commenced to pulling upward on the barrel. Wouldn't budge! Soaked the whole dang thing in kerosene for 24 hours. Came back to it, tried it again and finally was able to remove it. Bore was badly pitted throughout, testament to the use of pyrodex and a lack of owner care. I worked the bore with green pads, bore paste and steel wool and it improved markedly, but couldn't remove the pits; they'r there to stay. But it shoots well! Moral of the story is to treat every gun as a loaded gun, especially those purchased from others via the internet.