Hey- I liked the story about the reloaded 3.5" 10 Roman candles- about the time I bought my first M12 3" Mag- 25 years ago- I had a goose hunting pal named "Early Up Eddie" he'd call me a 0300 hrs and say- "Gear Up, Jarhead' the Geese are movin' he bought a Spanish AYA 10 bore double 32" barrels with a single trigger- We set out some field dekes and waited- 4 came over above the tree-tops- "Too far" I said to him- "B.S." he replied, swung that freakin' cannon a mile to mexico, hit the trigger- Ka-Boom-- and a big goose dropped and bounced hard on the frozen picked cornfield-- Wow-I thought-
After we retrived the bird and poured some coffee- another group went by and circled- Ed opened his gun, then closed it and handed it to me and said- "Shoot a real man's gun, buddy" so I gave him over my M12, tried to balance that telephone pole escopeta, swung about 5 bird spans ahead of the leading bird, hit the trigger- Boom- I went back about three steps, the last bird in the line dropped stone cold dead- When I recovered, I opened the gun, and saw that only the right tube had a shell in its chamber- the left one was empty- 
So I asked Ed- he said" Yeah- if I load both barrels, about every third time it doubles and lets off both at once- What could I say- but "Thanks, amigo"-- Whatta cannon-