Yep, I see that.
My gut feeling is that hard hammer strikes are deforming the cup against the anvil inside the primer.
This close-up of the firing pin indicates that all is well but it’s just a side shot. Tonight I’ll take a straight-on close-up of the firing pins end to confirm its condition.
One thing I am sure of is that I won’t suffer any light hammer strikes; it falls with a great deal of authority, leaving deep craters.
![]()