[Donut]

The special angle would vary depending on the speed you're willing to fire the ball at. Lower speeds would require a higher angle, and give you a shorter range closer to the goal (for example, 3ft. to 10ft.). Higher speeds allow you to use a shallower angle, and give you a longer range farther from the goal (like 12ft. to 30ft.).

Which one you want to use depends on your strategy, how much power you're willing to give the shooter, and the angles you can actually get on your robot. For example, you may want a somewhat higher angle if you intend on always shooting from close in, that way this range is close to the goal and you can save power. Shooting faster obivously gives you more range, but drains more power, and might stick you with a problem of being too close to shoot.