Barry, can you get a better pic of the primer on the discharged round?
eggzactly. I see a firing pin strike as well as primer flow, as in pronounced loss of radius. That did not happen inside a box on a counter.
But the image is severely out of focus. A good focus might yield very different conclusions.
At this point, I would guess the cartidge was held against the face of a bolt by an extractor in a vastly oversize chamber, then the stryker was dropped.
The story about detonation in the box on the counter is cover by a kid who was doing something he knew better than to do.
