Hi there, with AL rimless cartridges reading pressures by primer appearance is terribly ineffective. Even seasoned reloaders often struggle with reading pressures by primer appearance.
With that said, based on appearance, those look to be very much on the low pressure side. As for the crescent around the FP indent, that looks more of an over sized firing pin channel, but could also be a characteristic of low pressure. Also note the over all features of the primers are rounded off, no sharp formed or flat surfaces. And out toward the edges of the primer pocket, there is almost no primer flow being exhibited, which would most certainly be present with higher pressures. And although primer flow to the edges of the pocket isn't as defined on rimless cartridges, and as what might be observed with a rimmed revolver cartridge, there would still be some obvious and defined flow characteristics in this regard.
So, considering the data and oal both suggest a resulting lower pressure load, I would personally feel I'm observing lower pressure, not high.
As for a more effective method for reading these type cartridges, how far the brass ejects upon firing, and velocities delivered over a chrony are often far more reliable means of making a determination.
Hope this helps.
GS
