This was my introduction to black powder and what led me into muzzleloader hunting. It's been sitting around rusting for 20 some years and I thought I would try to clean it up a little. The bore doesn't look too bad.
Don't let anyone tell you Evapo Rust isn't a good product.
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"Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, a total wreck, screaming Yahoo, with a big smile on your face."
I saw one of these sell on that TV show Pawn Stars. they took it out and shot it to make sure it worked. I wanted a slightly larger version positioned near my front door at home.