That's the real take-away here. The gun's modularity allowed it to survive the double-charge damage with a quick, cheap, and easy grip frame switch.But if you stopped at reload you only got to what caused the failure. What you may have missed is that it did not harm the barrel or action, just the grip frame. Swapped the internals to a new grip frame and the pistol ran fine. Guy even caliper'ed the barrel to make sure there was no swell.
Pretty impressive really.
So for the TLDR's now you know...the rest of the story. (In my best Paul Harvey).