IMPROVED PRECISE SHOT [GENERAL]
Your ranged attacks can ignore the effects of cover or concealment.
Prerequisites: Dex 19, Point Blank Shot, Precise Shot, base
attack bonus +11.
Benefit: Your ranged attacks ignore the AC bonus granted to
targets by anything less than total cover, and the miss chance
granted to targets by anything less than total concealment. Total
cover and total concealment provide their normal benefits against
your ranged attacks.
In addition, when you shoot or throw ranged weapons at a grappling opponent, you automatically strike at the opponent you have
chosen.
Normal: See pages 150–152 for rules on the effects of cover and
concealment. Without this feat, a character who shoots or throws a
ranged weapon at a target involved in a grapple must roll randomly
to see which grappling combatant the attack strikes.
Special: A fighter may select Improved Precise Shot as one of his
fighter bonus feats (see page 38).
An 11th-level ranger who has chosen the archery combat style is
treated as having Improved Precise Shot, even if he does not have
the prerequisites for it, but only when he is wearing light or no
armor (see page 48)
看原文,这意思是可以不用掷骰你自己选定目标骰攻击检定命中