Originally Posted by ClapperZapper
I have only seen one steel load factory fresh that ever damaged a barrel. (...) That was a manufacturing defect in the barrel forging.

Sounds like that one "Howdah'ed" old Holland & Holland double rifle, with which Buckstix recently regaled us. Also otherwise well documented for those times of yore, when "fluid steel" was still sort of a novelty.

Carcano