This is what I'm running.


For Halo 3, weapons with rapid fire ...

greatly improved:
br
carbine
melee / punch
ghost gun

somewhat improved:
plasma gun
alien blue gun
spiker
bruteshot

no change:
sniper
rockets
sword
shotgun
mauler
(everything else not mentioned)

slightly hindered:
ar
SMG
chain guns

absolutely useless
laser



Now with Reach, the only gun that works well with rapid fire is the DMR. Everything else has been coded to work worse with repeated button presses.