Obsessed with Doubles; sorry about the slow reply as I have been busy working the dogs on shoots - out again tomorrow. Those kilns are shot up but via a port in the side, the gun used is not a very conventional thing at all but I understand Winchester did make a single barrel gun that looked like the model 37 for this purpose.

Douglass McDougall (now deceased) wrote three books on 8 bore loading, plus some others on wildfowling in general. The 8 bore books are; 8 Bore Guns and their Cartridges written in 1979; More 8 Bore Loads written in 1981 (both paperback) and a hardback edition which combined them both with a small addition called 8 Bore Ammunition written in 1985. I have them all but they are now very scarce. Lagopus.....