Primer photo suggests a bit of tolerance between the firing pin and the pin hole. Pressure appears to be OK as the edges of the primer are still rounded photo 3 looks lIke it's a very light load the pin indentation is rounded. Mind you primer shape is not the most reliable indicator of pressure still it can be a guide..
Leaving the primer out is better than putting it in backwards and firing it. Nasty little bits come out the vent hole in the bolt.
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