Testing mangled brass is a moot point with me. I have no intention of ever using brass like that pictured in any gun of mine, I have absolutely no need (And I wouldn't think my guns' chambers would contain, alleviate any damage. Chambers do get damaged). For a End of The World situation (Mad Max like) there might, might, be a need, but I'd go with a muzzle loader and besides If cases became unavailable, absolutely no brass supply, I have enough to last me the rest of my life. Be Prepared!..