That's basically the antiquated French 7.5mm MAS loaded with modern propellant. We'd need an entirely new rifle system that would suspiciously end up looking just like our old rifle system that was uniformly abandoned by every participating NATO member.
I've heard this baloney before. The modern trend for accuracy is a shorter and wider case that provides for a fast flame wall using a 6.5mm projectile. We already have better (and equally archaic) 7mm cartridges than what the author proposes, and if you're going to base it on the .308 Winchester case, stop screwing around and just go with the existing 7.62 NATO round so we can all pretend it's 1956 again.
What? We're going to bring back FALs and M14s? I have serious reservations about both designs. Ask Eaker to show you pics of his old M1A.
What's needed is something along the lines of the Steyr AUG-A2 in 6.5mm PPC with an updated accurized trigger system. End of discussion.
Amen to that, or one of the new WSSM's, pick your caliber-( what's a calibre? sarcasm)