[scott.smith]

Catapults are more reliable and accurate, and are also amazing at batter shots. However, wheeled shooters can swivel on a turret (254 style) and have more angles of release. With catapults usually you can just get 2 different angles of release. Plus you have to worry about the ball falling out of a catapult. That being said, I have seen extremely successful robots with both types of shooters.