Bonanza you are a lucky man, no other way to say it! If that ball had not been down against the first one the story may have had a different ending.

What you need to do is, find a steel tube about the size of your ramrod, Take a long large wood screw, cut the head off it, and stick about 1 inch of the head end in the tube, and braze it into the tube. Then weld a T-handle on the other end. With this you can push the screw end down the barrel, and twist the T-handle to turn the screw into the lead of the ball, and pull it out. I wouldn't recommend shooting two balls out of the same barrel seated over a full load of powder, too often.

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PS: I have several muzzle loading double rifles, and I took a wooden dal rod and turned about 1 1/2" of it down to fit in the muzzle of the barrels, and turned down the other end into a ball and painted the ball red. When I get ready to load, I place the red top in one barrel till the other one is loaded, then place the balltop in the loaded barrel while I load the other one. The red ball on the plug is larger that the outside of the barrels so it can be seen when the rifle is shoudered so you don't fire the rifle with the plug in one of the barrels.