I have a damascus 12 gauge gun with .080 in front of the chambers. I am comfortable shooting low pressure 1 ounce loads thru it. Minimum wall thickness everywhere else is .024 What works for me won't necessarily work for someone else. I also once owned a Beretta Vitoria 16 gauge made in 1949 that had original .017 wall thickness 7 inches from the muzzle. Never had a problem with factory ammo. Sold the gun because it didn't really fit me well and disclosed the thin walls to the new buyer.

"As for me and my house we will shoot Damascus!"