Gene - Funny you should open the 6.5/6.8 "can of worms" again. Solid argument from the ballistics perspective but not much else to recommend either one as a practical military solution. My gunsmith and I have been playing with rebuilding AKs ($750 worth of parts, etc. to have a $350 rifle - not counting what the "smithing" services are really worth
) for entertainment/education. (They make a fun "truck gun".) He's actually decided to put one together in 6 or 6.5 PPC just to prove the point. We discussed the 6.8 but I haven't checked for magazine compatibility. Too much fun tinkering on winter afternoons.