Great round on paper. I'm currently in the process of building one and look forward to testing it out..
However, I doubt we will ever see adoption on a large scale by the military due to the logistics and politics involved. It's a shame as I feel it strikes just the right balance between 7.62x51 and 5.56x45. It's light enough to allow a soldier to carry numerous rounds and packs a great deal more power at closer range than the 5.56.
Why reinvent the wheel? If the Russian 7.62 can knock a person down with one hit. Our 5.56mm is lighter to carry but it requires three rounds to knock an attacker down. the advantage of more rounds disappears quickly if you need three times the rounds to do the same as one heavier round. Why invent another round if the Russian 7.62mm is widely available in most third world hellholes??? If I were King for the Day I would modify current M-16 configuration to accept a larger mag to hold the Russian round and new uppers chambered to shoot the round. Otherwise take the AK-47, product improve the design and issue it to our troops in Iraq. I remember how bureacracies can kill victory. During World War II copies of Russian T-34 tanks were captured by the Germans during their advances into the Soviet Union in 1941. The T-34 had wide tracks that made it ideal in Russian mud and sloping armor that held up well against most of the German tanks (except for the PzIV). The only reason this superior tank was not fully exploited by the Russians were the poor handling and deployment of the excellent system. The German field commanders made their requests to the Nazi weapons' designers quite simple, copy design, paint it gray and put an Iron Cross on it. Instead the German bureacracy wanting to keep every manufacturer happy kept the old tank production lines running and took time to develop the PzV tank. The PzV tank was good against most Soviet tanks, but they were hard to mass produce and not as reliable as the T-34. In the end the delay caused by developing a new tank and not reducing the number of types of tanks in the field caused the Germans to be inefficient industrially and logistically. A factor that cost the Germans the war against Russian numbers.