Not to hijack this thread but do you want to post a little refresher on virtual mass Sylvan? What would be an average figure for a moderate/typical setup on one of today's bows?
Here is a good site to learn about virtual mass as well as many other archery physics topics
http://homepage.ntlworld.com/joetapley/
I think of virtual mass as the equivalent amount of mass that is accelerated if you were to dry fire the bow. Its kind of the equivalent of all the wasted energy expressed in terms of added weight to be accelerated. When you shoot an arrow it takes energy to accelerate the mass of the arrow plus the virtual mass.
Typically modern compounds will run 100 to 150 grains of virtual mass and of course the lower the better. Here are some values taken from the last 3 issues of Bowhunting World.
Mathews Outback - 91-98 grains
PSE Vengeance - 150-156 grains
High Country TSSR Carbon - 140 - 155 grains