Re: How can you tell if a remington shotgun has a damascus barrel
Gentlemen, I am on the side of caution, I have not seen a damascus barrel fail and I damn well do not intend to shoot one (with any loads) and try my luck.
There are too many other shotguns I can fire safely. It may well be that they are safe to shoot, but, I would NOT recommend it to anyone.
One facet that you both seem to have missed is quite important; the use of corrosive primed ammo was quite common "back in the day" as it was the only ammo made. Using this ammo and POSSIBLY not cleaning the gun well can most certainly encourage rust to form along the seams in a damascus barrel. In addition to this should you add 100 years of time for any additional deterioration or oxidation; regardless of initial strength, you have a thin metal tube of now unknown strength. Rifles do not concern me as they have a much higher (excess) strength to begin with, shotguns have less redundant strength.
Do what you want, I would highly recommend "tubes" in a damascus barrel and shooting smaller guage rounds.