Blown up
IMO he blew up the gun with a double charge....I have seen four guns blown up over 40 years with double charges of fast burning powders, ...an N frame Smith & a K frame & they looked just like the one in his video.....which blew off the top strap and a portion of the cylinder, a 1911A1 in an IPSC match.....blew the mag out, flattened the sides of the cartridges, blew the grips off, and cracked the slide where the slide release lever went thru the frame, and a G-21.....which simply left only the grip frame....each event was announced with a tremendous "Boom" and left no doubt that something bad had just occurred....operator error on all accounts.