That figure is probably closer to a Patrol Order (Heavy) once you take into account some form of armour whether it be MCBAS, TBAS, Eagle Marine or whatever and the extra water and ammo that go in the day packs. Once you look at Marching Order than you've got all that plus an extra 15-20kg in pers kit and associated loss of space on whatever means of TPT you take.
Thankfully a lot of dismounted work is supported via Bushmasters (hopefully in overwatch) so most of the kit can be left with them but there's still a whole shed load of gear that the average guy is lumping around all day everyday.
Forget the M113s, the Bushmasters are saving too many lives over there ATM. The flat bottom (on both the LAVs and M113) just doesn't cut it anymore.
Without the tab data to compare on hand, how many of each can the Herc and C17 carry of each? The M113s are unlikely to be deployed anywhere that has shown to develop and use EFPs so that only leaves the Bushmaster as a deployed IMV, PMV (whatever it's called today)