Your guns have fluid steel barrels. Here are some examples of damascus.








For more see:
http://www.damascus-barrels.com/Image_barrels.html
http://www.damascus-barrels.com/gallery.html

The issue is not fluid vs damascus, but rather when they were made. Proof laws (pressures) have changed. The guns will do better with lower pressure loads, ie 9,000 psi and under. Modern guns are proofed to 12,000 psi.

I purchase my shells from wwww.rstshells.com. They sell the correct pressure shells for old shotguns and deliver to your door.

Pete

http://www.damascus-barrels.com/Movie.html