Needs review
Source: Player's Handbook

Description: You reload a crossbow more quickly than normal.

Prerequisites: Base Attack Bonus +2, Crossbow Proficiency

You can reload a hand crossbow or light crossbow as a free action that provokes an attack of opportunity. You may reload a heavy crossbow as a move-equivalent action that provokes an attack of opportunity. You can use this feat once per round.

Normal

Loading a hand crossbow or light crossbow is a move-equivalent action, and loading a heavy crossbow is a full-round action.