What do the numbers 586 in the headstamp stand for ?, the 4 segment HS is / / 7 / 4/ 586 , the 586 is in the 6 oclock position cn. fmj pointed bullet 3 crimp brass primer with blue/black primer seal , thanks Randy
I think 586 is the contract code for Hirtenberger of Austria.
Jon’s identification is correct. This also exists in spotter-tracer loads in 9mm Para. They were made for Sweden, and the code is the Swedish code for Hirtenberg.
Thanks for the replies Randy