Gentlemen,

This is n argument that can be settled by no one here with out the quatitative fomulas. All it is is physycs.

Shooting a heavier arrow will NOT neccessarily produce more KE or PE (what some of you refere to as "momentum".)

In theory, yes, a hevier arrow will broduce more PE and KE. However, the arrow will fly slower and have a different trajectory UNLESS the draw weight of the bow is incresed to off set the weight of the arrow.

I have done the math too and a heavier arrow will produce more KE at closer range and less KE than a lighter arrow at longer range. Gravity robs the heavier arrow of KE earlier than the lighter arrow.