Looking at these pictures, it is obvious this is ammunition related. Sources indicate the shooter was running hand-loads. At the time of this writing, it was not clear if the wrong powder was used or if it was a double charge?
Regardless, results were catastrophic. The KB (Short for KaBoom) blew the barrel apart at the chamber, shattered the frame; and from the looks of the picture, may have even bent the slide. But that “might” be a distortion of the image in the photo.
The real shocker is the report that the shooter was not injured. That is a real testament to the Walther brand actually. Nobody can make a firearm strong enough that’ll prevent users from turning them into pipe-bombs. User error. Not the maker.
“Shooting Guns & Having Fun”