Originally Posted by
daveyrock
Does the weight of the arrow make difference [penetration]? I'm shooting a little lighter this year.
A bow is generally more efficient, when launching a heavier arrow. So mathematically, shooting lightweight carbon arrows will cost you a little Kinetic Energy (penetration) at the target.
The above is an excerpt from and article I read now and again, it has a lot of good stuff regarding speed vs weight.
http://www.huntersfriend.com/2007-Ca...ion-guide5.htm
And to muddy things a little more:
http://www.booneman.com/_terminalarrow.php