Thread: Over pressure signs when there wasnt any before

I'm seeing the primers flatten out quite consistently on a 7mm RM load 162ELDX - 70gn of AR2217 fed215
Have shot up to 71gn and not seen this before.

Is this possible due to the cases being third firings and/or I push the shoulder back 0.02" to far?
https://www.nzhuntingandshooting.co....ll-used-81123/






Edit think i goggled my answer
"Often, a flattened primer indicates excessive headspace rather than high pressure. If a cartridge fits loosely in the chamber, the primer will flatten out when the case head slams back against the breech face during firing. This can happen even with low pressure loads. The primer brand can also have an effect on the amount of flattening. Federal primers are soft, and will flatten more than other brands with everything else being the same."


Assume these are ok to fire and i should look for pressure signs in other places?