Mark - if you study the various charts/programs used to calculate the trajectory of a bullet, you will find that the weight of the projectile is not really a factor in the equation. Although, generally, heavy bullets have better B.C.'s than light bullets; there are some very long slender bullets in the .22 and 6MM calibers that have B.C.'s comparable to the larger bores - and, in that case, they shoot just as flat - sometimes flatter, since their initial velocity is often higher.

What I hear being argued here, in principle, is that a given diameter arrow would have more drop at close range, but less drop at long range, if you made it heavier by adding some weight to the inside of the shaft. And I'm saying that the initial velocity will go down because it is heavier - and that it will never recover that velocity over distance because the ballisitic coeffcient of the arrow never changed. All that changed is that you had to move the 20 yard pin down a little to compensate for the slower arrow; and subsequently altered the upward arc of the arrow's flight.