It's a decent platform IMO and with the right ammo it's plenty lethal out to 600 yards. The problem in the sandbox is our guys aren't using the correct ammo.
A 62 grain soft point bullet moving at 2000 fps makes a hell of a mess. The nice thing about being a civilian is that one isn't constrained by those stupid JAG rules that say only FMJ ammo can be used.
Is the .308 superior? No question it is. There are two .308 platforms in my safe. But I sure as hell wouldn't want to have to hump one up and down the mountains of Afghan land.
IMO, and no one listens to the likes of me, platoons and squads should carry a mixed bag of weapons. The majority of rifleman could have that M-4, but there should be at least a couple of 7.62 platforms on hand for designated marksmen.
And we have to get away from those stupid rules about the bullet. Replace that crappy SS-109 'penetrator' round with a soft point or hollow point. Screw the Hague Convention....