Ok..Some questions... Are these abrasives in the paint we use also? Has anyone anywhere using paint noted this wear? I remember reading of tests by the U S Army years ago that said it took 10,000 rounds of 30-06 to make a service rifle unserviceable because of wear affecting accuracy. ( They used a 6 MOA figure for disqualification.)
These 9mm boolits would have to be very abrasive to do this damage in the pictures.
Surely this abrasive would at least scratch the sizer die enough to be apparant in close inspection. Right now I have more questions than answers.