I'd be down with a few others carrying pig ammo. A Platoon Sergeant wouldn't be, so that's why I didn't give him any. Rank comes with privilege, and one of those privileges is not carrying 20lbs of extra rounds when there are other troops available for that.

Oh, and a note on the marching orders...Best I could come up with for the scenario. A The wedge is bad juju in close environments like a jungle, and an echelon right or left is going to spread them in a line and triple the chances of a booby-trap. They don't have enough men for a wedge to work anyway, since it's a fireteam formation, not a squad formation.

Plus you never walk in a straight line. People are in each other's line of fire from both directions, and a line of dismounts is a machine-gunner's wet dream. Staggered column is the way to go for this scenario. No formation is perfect, but it's the best choice in the circumstances.