[ATTACH=CONFIG]19152[/ATTACH]
Ok so I enlarged the view of the other failure and I want to point out a few more things that support the blowout (while still in battery) model.
Based on this picture, the blowout looks to have started where my red arrow is indicating. The brass is literally blown out and there is a flap section of it further away from the tip of the red arrow. This section was the weak point which again is right at the unsupported wall score line.
And the tearing of the brass continued along the score line from the unsupported wall. It ended approximately where my blue arrow is pointing.
Again, the blowout model is still at play here. IMHO.
Edit: Remember too, that the extractor part of the bolt has more room for the brass to expand than all the other areas where the lugs are. The extractor tip is literally smaller than a bolt lug, so the brass is going to expand there first due to the path of least resistance for it.
Ok so I enlarged the view of the other failure and I want to point out a few more things that support the blowout (while still in battery) model.
Based on this picture, the blowout looks to have started where my red arrow is indicating. The brass is literally blown out and there is a flap section of it further away from the tip of the red arrow. This section was the weak point which again is right at the unsupported wall score line.
And the tearing of the brass continued along the score line from the unsupported wall. It ended approximately where my blue arrow is pointing.
Again, the blowout model is still at play here. IMHO.
Edit: Remember too, that the extractor part of the bolt has more room for the brass to expand than all the other areas where the lugs are. The extractor tip is literally smaller than a bolt lug, so the brass is going to expand there first due to the path of least resistance for it.