How often do you hear of final tuning the draw weight of the bow to a particular arrow? The charts show the spine of this arrow to have a range of 45 lbs. to 52 lbs. - but apparently there is a sweet spot at 47 lbs.
That sweet spot will change with tip weight, draw length and the particular bow being shot. It has more to do with the arrow, then the bow. This is why I believe the most overlooked aspect is tuning the arrow. Pay attention to Len's trilogy of tuning the bow, the arrow, and the person. Most will will work hard on two of those, but few pay attention to tuning the arrow.
These are the steps that aren't often done, but will help:
Spine test for consistency and stiff side
Put enough weight on the front
Put enough drag on the rear
Bareshaft tune for spine
Trim from both ends
Spin for broadhead straightness
Adjust draw weight to fine tune dynamic spine