Rapid Reload

 
Prerequisite(s): Proficient in chosen Crossbow type.
 
Benefit: The time required for you to reload your chosen type of crossbow is reduced to a free action (for a hand or light crossbow) or a move action (for a heavy crossbow). Reloading a crossbow still provokes an attack of opportunity. If you have selected this feat for hand crossbow or light crossbow, you may fire that weapon as many times in a full attack action as you could attack if you were using a bow. You can gain Rapid Reload multiple times. Each time you take the feat, it applies to a new type of crossbow. A fighter may select Rapid Reload as one of his fighter bonus feats.
 
Source: Player's Handbook, Epic Level Handbook