found this...

https://firearmshistory.blogspot.com/2010/06/barrel-making-steel-barrels.html

note the last paragraph...

The rise of smokeless powders also had a lot to do with the decline of damascus barrels. Smokeless powders generate a lot more force than black powders. Smokeless powders also burn along the length of the barrel since they're slower burning than black powders, which mainly burn at the breech end and blow out an unburnt quantity out of the muzzle. Many damascus barrels couldn't withstand such pressures and those that could needed a lot more time and effort to manufacture. Hence steel barrels became more and more popular as smokeless powder became prevalent.

does this support my contention that it is dangerous to shoot smokeless powder in twist steel shotgun barrels?

and, doc drew, your input is particularly soliciated...

Last edited by ed good; 07/08/22 10:48 PM.
keep it simple and keep it safe...