omfg that would be fricking awesome. A new nato round would be the best thing to happen to the civvy surplus market since the switch to autoloaders.
"...is the 6.8mm a NATO round or soon to be..." Nope. Won't happen unless the U.S. changes their service round. Both the 7.62 x 51 and 5.56 were jammed down NATO's throat by the U.S.
In the mid to late 50's, several European countries were working on a 7mm service cartridge, but the U.S. had selected the 7.62 and demanded it be adopted. Same thing happened when they went to the 5.56 in the 60's.