After seeing a post by Jamoe I went hunting for info on BF2 hit boxes. It seems they have improved a lot in the patches. One thing left, which can be manually changed however, is this:
http://www.zomgstuff.net/forum/showthread.php?p=22514
This could explain why hit boxes apparently usually trail (shooting choppers near the tail usually gives more hits).
Will try and change it Monday to the relevant ms of the dmw server and see if its any good...
yeah noticed soem of this a while ago with BF2,
at extreme long range i usually go with the the CH mil dot just above the head with the M95, as with choppers and VTOL's if you can get underneath an to the rear you do the most damage with the M95, or with said air craft wait until havering over a flag and remove there head (re-decorate the HUD in blood red :devil:)..
as for the other specialists the only other one is medic that i play and have got the enfield which is virtualy a sniper riffle that has rapid fire and try to keep close to the enemy or flank them