Of course it is 8mm, all Hakim's are (just to stop the snide commenters among the crowd!)!!
Anyway, I have had this gun 20-30 years and it is still unfired by me.
Anyway I got to thinking maybe it would launch lead (gas system may give one a snoot full of lead/lube gases with each shot).
So anyone have any experience.
I have the 175 gr. GC GB and the 150 PB GB.