PEARL wathching your arrow fly can lead to some bad habbits (arm drop) Plus thats bad follow through.
After you release NEVER TAKE YOUR EYE OFF YOUR SPOT watching your arrow fly dose just that.
After your release never takeing your eyes off your spot.
Don't do anything untill you HERE your arrow hit.
Forget the 300 round get you a judio start takeing long slow walks. You'll get more out of being on a range.