RE: Whats wrong with my setup?
Good post Paul and I am,for the most part in agreement,especially when Bernie says we are not machines.
Most of what you post is true for very good tournament shooters but when hunting with low energy setups like yours, and mine to some degree,we need a very well tuned bow to ensure full benefit of penetration.
It is very true that tuning is for forgiveness and imo centershot is the most important factor for a forgiving setup and then having an arrow that is stiff enough to handle the energy.Of course this is only true if the bow fits the shooter perfectly.
Even a bow that has extreme fletching contact can be shot very accurately,provided all the arrows have the exact same contact with the rest.If they are all impacting the rest differently,the shots will be all over the place.
Like you say,most can't tell the difference but one thing I have noticed about arrows and spine,the closer I am to the "perfect" spine,the better my scores are outdoors.It's that forgiveness thing again.[:-]