In 1961 a sixteen year old kid was wandering around a gun show in Jefferson Parish, Louisiana, and came upon a table with a stack of funny looking rusty double barrel shotguns. These things had two hammers, two triggers, and a stick hung under the barrel. And boy, they were cheap. Well, that young fellow had been washing cars on week-ends for a buck a car and had money to burn. So he turned over thirty of his hard earned dollars for one of those things without knowing a thing about them, other than it looked to be about 20 gauge. The guy who sold him that gun sure had a funny look on his face - said something about "wall hangers".
Back home, the kid took the barrel off of the stock and cleaned up the wood with mineral spirits and rubbed it down with furniture polish. It looked pretty good. Then he rubbed the barrel down with fine steel wool and oil. Most of the rust came off and the barrels had a pleasing brown color. There was even had a little engraving on the top rib between the barrels. The insides of the barrels was pretty rusty. So he began scrubbing it out with his shotgun cleaning kit, but the back end of both barrels seemed to be blocked with something. So he filled them with soapy water and began poking around. When he dumped the water out, a bunch of bird shot and black gook poured out of the muzzle. After a while he got them pretty clean, and with some more steel wool wrapped around a 20 gauge brush they were shiny and fairly smooth.
Now there was no way to put shells in the darn thing. No matter how hard he pressed those protrusions sticking out of the breech, the gun would not open. So he visited one of the several local gun smiths (remember when there were several in your area?)
The fine old gentlemen (well, he seemed old at the time) explained the intricacies of muzzle loading. He also replaced the nipples on the gun and inspected it thoroughly, at no cost. He said the gun was made in Belgium in the late 1800's. He sold the kid a can of Dupont black powder and a tin of percussion caps, and gave him a sock full of #6 shot.
"This is what you do" he said, "fill the cap of the powder can with powder, and dump one cap full down each barrel. Then ball up two or three sheets of toilet paper and shove them down on top of the powder with the ramrod and pack them tight. Then fill the powder cap with shot and dump them down. Then ball up another sheet of toilet paper and push it down to hold the shot in place. Put caps on the nipples and you're ready to go. Be sure to carry the gun with the muzzle pointed up as much as possible and don't c0ck it all the way until you're ready to shoot." Then he gave the kid an old Dixie Gun Works catalog and said "here, read this".
Well, that kid took the gun to the batture of the Mississippi River that same evening when the blackbirds were coming back from the grain elevator up-river to roost in the willows, and had a blast wingshooting blackbirds at twenty yards. HOOKED FOR LIFE! (And stayed up all night reading that Dixie catalog.)