Mythbusters did test whether a katana could cut through a hot 50 cal Browning barrel, as was alleged by some people to have happened. They heated a ma-deuce barrel to the kind of heat it would reach from extended firing, and made a machine to swing it at the upper limit of human ability. Result, broken blade, intact barrel. Next they heated the barrel red hot. Broken blade. Next, white hot barrel, and blade at 3x the maximum human speed. Small cut into the metal, broken blade.
Myth busted.
I saw that too. That’s why I thought of them when I saw this video. Somehow, I have the feeling Adam and Jamie would love to do their own tests on this!
Their machine swung the blade at the worst possible angle, which would not cut.
They do a lot of junk science.