A man in Iraq sent me a photo of this today. Any idea what this is? one side looks like a 7.62x39. is that some sort of primer on the side of that ring? some sort of training round or sub caliber for a rocket launching weapon? No idea. sorry for the poor photo.
perfect! thank you sir
By accident I found the answer to your puzzle I hope you are a member of the IAA journal
if you are find issue March April 2016 and go to page 42 your answer will be there better than
I could ever explain it to you