I'm a hypocrite because I counsel caution and inspections for others in these matters and for decades blithely and innocently fired the hottest CIL "blue Imperial" duck loads without incident in twist, damascus, laminated hammerguns. I still do but It's all low-pressure now. In more than 65 years of shotgunning I've never seen a rupture and only one bulge. I'm also agnostic about "proof to make sure they are safe." Nothing is safe or certain about explosions in guns, particularly if they are old.
