Choose one type of crossbow, such as heavy crossbow, You can fire that type of crossbow as fast as a bow.
Prerequisites: Quick Draw, Rapid Reload, Weapon Focus (crossbow type to be selected).
Benefit: The character may fire the selected type of crossbow at his or her full normal attack rate. Reloading the crossbow does not provoke attacks of opportunity.
Special: A character can gain this feat multiple times. Its effects do not stack. Each time a character takes the feat, it applies to a different type of crossbow.
Source: Standard Reference Document under Open Game License v1.0a, which updated this feat originally published in the Epic Level Handbook, page 61.