Disclamer: In the game in which this feat is used The prereq for Weapon Specialization was changed from Fighter level 4 to BAB +4.
Weapon Mastery [Combat]
Prerequisites: Weapon Specialization, Weapon Focus, Expertise, BAB +8
Benefit: The master of a weapon gains a circumstance bonus to his/her base attack bonus of +2 with the mastered weapon. The master of the weapon also gains a +2 circumstance bonus to damage with the mastered weapon. This feat may be taken in the case of spell, only rays and touch based spells are affected. Damage in the case of spells are not increased, instead the DC of the spell is increased by +2.
Weapon Mastery [Combat]
Prerequisites: Weapon Specialization, Weapon Focus, Expertise, BAB +8
Benefit: The master of a weapon gains a circumstance bonus to his/her base attack bonus of +2 with the mastered weapon. The master of the weapon also gains a +2 circumstance bonus to damage with the mastered weapon. This feat may be taken in the case of spell, only rays and touch based spells are affected. Damage in the case of spells are not increased, instead the DC of the spell is increased by +2.