a/ Excess Pressure
b/ Excess Head spacing
c/ Sloppy Firing Pin in its hole and maybe assisted by weakened spring.
If those are ejector plunger hole marks I would look at excess pressure first.
a/ Excess Pressure
b/ Excess Head spacing
c/ Sloppy Firing Pin in its hole and maybe assisted by weakened spring.
If those are ejector plunger hole marks I would look at excess pressure first.
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