The US Army I believe is looking into reintroducing the 7.62 round as a standard issue round for the grunts.
Seems like they're falling back into time with that... there were, and still are, good reasons to switch to 5.56.
The problem the US army has is that they don't really have a weapons on the squad that quite gets the job done at 600 metres...
It is strange because no other military seems to have a problem as bad as that... Or willing to change to combat it, perhaps.
Question for people who know this, is the M240 still a crew-served weapon that is carried by a squad? or is that just the M249?