If you don't mind me asking what's the advantage in adding that much weight?
Better stability which leads to better arrow flight, more penetration, less wind drift, more momentium down range not to mention the arrow will absorb more of the bows power that would have been transfeered through the limbs into the riser causing vibration/hand shock andthe bow will bequiter.
I am sure I forgot a couple of things but I think you get the drift