There was a very interesting article done in Bowhunter a couple of years ago. It was a test of mass and speed at different ranges. Basically, it tested what you are talking about Coug. Arrows of different mass, and how fast they were at differnt ranges. I think I remember the results were actually pretty flat as far as losses at normal archery ranges, say under 50 yards, but I am not sure. It also looked at vanes vs feathers, so it took the whole resistance and drag thing into the mix. I will see if I can find it, seems like it will have some good info for the direction this discussion has gone. It was a great read anyway.

JMAC