ARs often leave a visible ejector mark on brass, even with safe loads, but it appears pronounced in your photos; potentially a sign of high / dangerous pressure. Also, there is what appears to be the beginning of case head separation (bright ring just forward of extractor groove). This is usually caused by a headspace problem rather than high pressure.

Enlarged primer pockets are often the result of loads that exceed safe limits. Regardless, that brass should be discarded. Do you know the history of the brass and does it all have the same headstamp? What is the data for your load?