I think some of us have seen shot out barrels, so it's probably possible to do. I'd never say never, but I'd only shoot lead in an antique or older unreplaceable rifled barrel, mostly because I'd like plenty left for the next generations.

Mostly, I hope you don't mind if I add, verticle stringing could be all sorts of things on the target of your hunting load, but maybe recheck that one when temps cool off to make sure you don't open the groups up more than you thought.