That had to be a heck of a charge but AMT isn't exactly known for quality.
We had a guy who double charged a .45 and shot it out of his Para. The gun handled the round O.K. but as it began to eject it blew the web out of the case, detonating the next round (or 2) in the magazine. It sent a bullet out the left side of the frame between the end of his thumb and trigger (and blew the base off the mag). Very lucky he didn't get hurt. The dumb ass then blamed the gun and wanted Para to pay him back for it. They rightfully said no (but offerd him a discount on a new gun, more than I would have done). We tried to explain to him it wasn't the gun but his stupidity and if he had been shooting a polymer framed gun we might be calling him stumpy. He never did "get it", but we've also never had to put up with him anymore, either.