A few years ago I was given a model 10-8. This thing was a real junker boat anchor. Couldn't even see light through the barrel and cylinder. Full of dirt & grease and beet to hell. I took off the stocks and threw into a bucket of kero. Let it soak for a week or so, then took it apart and attacked it with carburetor cleaner, a tooth brush, and a compressor. Wouldn't you know, this thing actually cleaned up pretty good. All that dirt & grease probably protected it.
Come time to shoot it and it shot way off to the left. Come to find out the barrel was loose. Tightened it up and it shot off to the right. Made a washer out of some thin brass shim stock for between the barrel & frame, and tightened it up a little at a time till it shot to point of aim. Increased the cylinder/barrel gap to .006, still OK. With 3 grains of Bullseye and an RCBS 38-150-SWC, this model 10 shoots right up there with the best of 'em. And I don't have to worry about scaring it up. Great truck & tractor gun.