I would like to see that being done, 7.62x39 is a 4moa round and with 300 yds being its maxium designed range and after 200 yards its falling like wet towel.
Add the AK's rudimentry sights with its anemicly underpowdered inaccurate 39 cartridge and its lucky to hit a platoon much less a man at medium ranges.
You can see it being done all over YouTube. Even at 4 MOA, that's 12 inches at 300 yards and relatively easy to achieve on a 16ish" plate, depending on the shooter and the weapon. By no means do I claim to be an expert or anything more than what I'd consider to be a decent shooter, but it's really not that hard. I've taken friends who had never touched an AK before, or who were new to guns altogether out to that club and watched them hit those same gongs with x39.
It's even easier with an SLR-107FR and a red dot, and borderline boringly simple with a Galil ACE and a magnified optic, but unfortunately I don't have personal videos of those either.