"Not a smart or recommended test, but probably just about the most harmless cartridge/chamber mismatch."
I was shooting some Winchester 180 gr. Powerpoints althernating between a .308 and 30-06. Was doing a run with the 06, single loading from the box with a very decent groupxs considering some older factory ammo. I wish I could have seen the look on my face when I picked up the brass. I'd shot two rounds of that .308 brass and the group was just great. Three rounds of 06 and two of .308 in a groups slightly over an inch. No problems whatsoever. Guess I must have had myhead in it's usual resting place.
Paul B.