Richard Davis, developer of Second Chance body armor (IIRC, the first practical concealable body armor) did this routinely to prove his product. He used a .44, then immediately shot bowling pins off a table to prove he was using full power rounds--the origin of the sport of "pin shooting".
A video of Davis proving his armor: Walking the Walk - YouTube
I believe Mas knows him fairly well.
The year I won my Dillon 1050 was at one of the “Second Chance Shoots” where Richard Davis always did that demonstration. Cringed every time I saw it. I mean, he was making a LOT of money, but I kept thinking to myself; how bad do you want to be rich?