Cratering on primers

[boltfluter]

Hi, aside from what each of us can see and interpret from the photo or give a meaning to the word "cratering," the behavior on the two primers is markedly different and the opposite of what should be seen based on the reloads used.
So my post is out of curiosity to know and understand why this happens.
Each of us here can do as we wish, but that doesn't fall within what was posted in the opening message and subsequently reiterated several times.

Best regards

Just as a test, why not try loading the same case several times with the different charges and see what happens. At some point it is going to come down to a process of elimination. Depending on how far you want to proceed with this test. Just a thought.
Paul

 

[6BRA]

Impossible for anyone to confirm as ideas tossed have been eliminated. You are the control. Here are my normal reloads...NORMAL.

 

[Bora72]

Just as a test, why not try loading the same case several times with the different charges and see what happens. At some point it is going to come down to a process of elimination. Depending on how far you want to proceed with this test. Just a thought.
Paul

Hello Paul, same result on the all the primers of the load test, from 35gn to 37gn.

 

[Bora72]

Impossible for anyone to confirm as ideas tossed have been eliminated. You are the control. Here are my normal reloads...NORMAL.

Hello, same tipe of cratering of myne.
But my rifle/action are mass production rifle not BR with special action or hand made working.
A this point I can sleep without troubles....

 

[Old Navy]

This is cratering. The next round blew a nice round whole.

 

[Bora72]

This is cratering. The next round blew a nice round whole.

This is really obvious. But in this case, not only the ridge formed, the cup material seems to have pushed the firing pin and entered the firing pin hole.