New caliber for assault rifles

[A.V.]

the "new" 6,5 mm grendel for future rifles?
According to this ballistic table is far superior to the wimpy 5,56x45 and the too powerful 7,62x51.

 

[Sridhar]

NATO 5.56 rounds have failed in Afganistan and IRAQ. They tailed off after the first 300 meters where most of the fights takes place(300 - 900 M)