I found a few odd 9MM cases in a batch of range pickups which I think I know what it is but would like to verify it if I can. At 12:00 it is stamped 23WIN and at 6:00 it is stamped 9MM Luger.
This ammunition, as far as I can tell came from a white box of WIN 115 gr. FMJ loads. I am assuming the 23 stands for the year of manufacture and the WIN indicates Winchester. Would my assumptions be correct? If not, what is the significance of the 23WIN headstamp.