I have found this image in the web and would like to hear if one knows the exact background of the ammo lot being designated as “HK” as this should indicate the company Huck of Nuremberg (which made only blanks to what I understood). Or is this a delibrity Heckler & Koch took, made a functional lot (without stating) and used it’s “self proclaimed” factory code “HK” (normally being Huck) outside of the German military system (as this box and ammo were not adopted by the Bundeswehr and so isn’t the HK23 - at least not officially).
Are the headstamps known?
Opinions or reliable info?