That's my current killer! Check out the draw mods. If they are black they are the smooth mod

, if they are gray like the cam they are the energy mod. At my draw length the energy mod is 10 FPS faster than the smooth mod, but I don't care for the stiff draw cycle.
I agree with Hoyt that the arrow length is correct, but spine and front of center are determined by more than just the length of the arrow shaft.
Proper spine is determined by knowing the length of the shaft, the weight of the head, the cam type on the bow, how you release it (release or fingers), and the draw weight of the bow.
A quick explanation of the term "front of center" with regards to the arrow. Ideally an arrow will balance towards the head for better flight. With target archery that's usually 6 to 9%. For broadheads 12 to 15%. The length of the shaft doesn't matter, but you do need to find the center, so when you balance the shaft you can measure how far forward the balance point is. Then you do some fancy arithmetic to come up with the %. I use a calculator
