Here is a thread (I hope) to a Double Guns site that has a couple of interesting video clips. The 4 bore clips look like serious fun!
http://www.gunshop.com/vintage6.htm
C.G.B.

oh my god, I gotta have one of those, was the poor guy behind supposed to be like a spotter as in weight lifting? He didn't do a good job!

Thanks for the url, that is one hell of a round, makes my 10 ga look like a pop gun