Hunter's kill shot is bugged.It does weapon damage only.
Spell details : ------
* Kill Shot
* Instant cast
* 5 - 45 yd range
* 7% base mana
* You attempt to finish the wounded target off, firing a long range attack dealing 200% weapon damage plus X. Kill Shot can only be used on enemies that have 20% or less health.
X denotes --
Rank --- Level ------ Additional damage -------- Cost
1 --------- 71 ------- [RAP * 0.40 + 410] -------- 30g
2 --------- 75 ------- [RAP * 0.40 + 500] -------- 30g
3 --------- 80 ------- [RAP * 0.40 + 650] -------- 30g
Details :-----
For lvl 80 it should do - 200% weapon damage + [RAP * 0.40 + 650]
Weapon damage is adding to it.
wowwiki link : http://www.wowwiki.com/Kill_Shot
wowhead link : http://www.wowhead.com/?spell=61006
thottbot link :http://thottbot.com/s61006
Explanation with case study :------ If a hunter have 4200 RAP at lvl 80 and use a range weapon with 254-472 damage with weapon speed 2.80(http://www.wowhead.com/?item=39296); then Kill shot ability of that hunter should do damage
Minimum(non crit) : 2*2.8(4200/14+254) + [4200*0.40+650]
Maximum(non crit) : 2*2.8(4200/14+472) + [4200*0.40+650]
i.e 5432.4 - 6653.2 damage (non crit)
But,It is not doing damage like this.Possibly doing only 100% of damage plus bonus ?