A barrel which is fashioned by hammering 2 strips of metal together around a mandrel. They were expensive when they were in vogue 125 years ago but they are weak and unwanted now.
Quite often the shotgun will tell you how the barrels are made. If it says "twist" or "laminated" or "damascus", then it is one of the types generally called damascus. If it says "armory", "forged",...
Damascus barrels normally have a twist-spiral banding on the barrel. Manufacture was by rolling two different composition metals around a mandral heating and forging the t wo metals together. Surface...