Home Forums Hunting & Shooting Hunter's Campfire model 70 explosion

One thing that doesn't seem quiet right with the rifle is the area where the bolt lug shoulders on the action that is sheared away.

When you close the bolt the bolt lugs are up and down (top & bottom), so I expected to see a bunch of white raw metal where it was sheared away provided that the bolt was closed.
But here I see blue color ? Maybe there was a crack in the lug area that let the bolt move back to where the shell was unsupported and blew.

The area I'm describing is here.