At a local range, I picked up (to my knowledge) an empty .30 caliber rifle cartridge with a foreign head stamp. Its origin could be possibly Farsi/Persian or Arabic, but I am not sure. From other cartridges that I've seen with Arabic head stamps, this one looks very different. Therefore I'm hesitant to say that the language or origin is from an Arabic speaking country. I've also checked the sites listed in the OP, but have yet to see any cartridge with a head stamp similar to this. Has anyone encountered a cartridge like this before?
The case is fired, so I'm sure that it's dimensions may be a little off as it isn't re-sized, but from what I've measured:
Case length: 54mm
Head stamp/case at shoulder diameter: 12mm
Attached I included pictures of the case in between a .308 win and a .30-06 for comparison.