A Damascus barrel is made by
welding typically three twisted strands of steel wrapped around a mandrel. The resultant barrel might be further machined/polished after the barrel is made. At that point, multiple barrels might be soldered or brazed to a center section that fits between the barrels. The barrel itself is NOT soldered or brazed together. That sort of adhesion would fail at the first shot. It isn't the soldered or brazed center joint that one needs to be concerned about, as those joints are fairly low stress (though those do sometimes fail), but the barrel itself that fails, often catastrophically. See image below.
A Damascus barreled gun might be quite safe to fire with suitable loads, BUT, and this is a very
BIG but, at some point, the barrel will fail, and there is no reliable way to tell exactly when that is going to happen.
I don't expect to "convert" anyone here. Minds are already made up on that subject, but if you are new to... especially... Damascus shotgun barrels, consider carefully the words of many gunsmiths world wide who generally do not recommend shooting or themselves will not shoot a Damascus barreled gun.
When I sold those guns in my shop, they were always sold "as is" with a strong suggestion that they be hung on a wall and never fired. I never encountered even one that was in good enough shape that I would consider violating that "rule". All of them were rusty POS guns, not even suitable for barrel lining. If they were safe to shoot, we would not have done that.
View attachment 196686