First off,don't be shooting spots at 73#'s
The ultimate is when you become ONE with the bow and can RELAX and let the pin float on the X.If you are trying to force the pin still,you are going to force the shot off and when that happens,you will pull the pin off the spot.
Think about it this way,if you are forcing the pin in the center of the X,when it moves,where is the pin going?It will be going AWAY from the center BUT if you are letting it float,it is always coming BACK TO THE CENTER so chances are,when the shot goes off,the pin is working it's way back to the center.