I remember years ago reading an article that defective Viet Cong and NVA rifle and mortar ammo had been inserted into their supply line. When used it would blow up the equipment and kill the user.
Time Framed late 70's
family member was involved with a guy who had been involved in EOD at Indian Head and other sites in MD during the 50's and 60's
I guess he was trying to explain how tough the AK 47's were ... he was aware of a CIA program to sabotage NVA Ammo
Stocks of ammo were captured, shipped stateside, bullets were removed and the gun powder replaced with a higher explosive, everything was buttoned back up like factory new, shipped back to Nam and left where the ammo could be found .
There never were any reports of any exploding AK's ... the weapons kept firing, the shooters never noticed anything different
all these yrs later I have to wonder did the CIA do any testing 1st and the case volume on 7.62x39 is pretty day small