Growing up, 50-60 years ago, every old shotgun was referred to as "Damascus", and was relegated to an attic, basement, barn or closet. The common wisdom was that you couldn't tell the condition of a "Damascus" barrel by looking at it. It might look fine, but they were known to corrode from within the metal.
There is some truth to that, but I think it mostly was grounded in folks using modern ammunition in guns that were never intended to shoot higher pressure loads. Throw cheap Belgian barrels into the mix, and you've got some real grenades in your hands.
It wasn't until I was in my 20's, and black powder shooting started to take off in my region, that I learned a little more about these old shotguns. I learned that "Damascus" was being used to describe anything old, and forged around a mandrel. Genuine Damascus barrels were, in fact, pretty rare. What people were calling Damascus was really twist or laminated steel. The first time that I saw a Damascus star pattern on a double, I was struck by the beauty of the thing.
Anyway, I've been shooting muzzleloading shotguns (both original and replicas) for many years, and have a lot of fun shooting them (cleaning them, not so much.)