I found the round below a few years ago. Unfortunately only the sectioned round was available. Apparently it is a Hirtenberger load. The case was probably headstamped “HP 99 9mm 07” but part of the headstamp is missing. This looks like a pistol version of the old Nosler bullets from years ago.
Does anyone have loaded examples of this cartridge?
What is the name/designation HP assigned this bullet?
Was this ever a production item?
Any information appreciated.