I'd assume no. It'll probbaly be a CoD like system of unlocking the custom loadouts at about level 10, untill then you will have to use pre-set loadouts (like on Reach)
43 in a btb heavies agem on graveyard (its on my fileshare on waypoint)
I might have got more than that in a objective based game (CTF or Oddball) but i cant remeber :/
oh right. So a spartan wearing a precurser helmet? that would be cool. espectially if the precurser knight helmet could be unlocked too, like the haunted helmet from reach.