The only reason for the HP HP hstp on 9 mm Para made for France by Hirtenberger (Austria) refers to the French way of headstamping cartridges at the time, when lots were ordered for Gendarmerie Nationale, and not especially for GIGN. The first HP is for the maker’s code, and the second for the brass furnisher…It was,of course an Austrian interpretation of the French system.
As for the French 9 mm Mak, lots of stupidities have been written about:
In the late 70ies, MANURHIN in Mulhouse -Bourtzwiller had been manufacturing cartridge machinery for a while and used to make test runs, for some quantities of loaded cartridges, unheadstamped.
The French Makarov rounds came from this tests, but probably some were discretely diverted and sent to th Christian Phanlangists in Lebanon,as they were just in heavy fightings at this time.
I have a copy of the original Manurhin drawing, text is written in German, which is natural as the factory is in Alsace. Of course, MANURHIN never answered our demands about the exact nature of this cartridges, neither did give their exact destination, but many reasons are in favour of some discret middle east country “contract”, or secret services delivery.
The same stories goes for 7,62x39 made for Albania, also on MANURHIN machines. We had this ammunitioin samples here well before any arrived in Albania and was so-identified later on !!!