I have South African 7.62x39 with 11, 12, 13 & 14. I was told these are Load designators, not factory codes. However, there seems to be some problems with this thought. I have the following loads:
11 87–Ball, Blank, Dummy, Proof, Armor Piercing
12 87–Ball, Soft Point
13 88–Ball, Blank
91 14–Ball, New Primed Empty
As can be seen, each of these numbers is being used for more than one load type. So, do the numbers really stand for different CASE modifications rather than LOAD types or are the headstamp bunters being used indiscriminately?