It sounds like I need to buy a " Hooter Shooter" or some device like that. I really would like to have one but don' t have the money to invest just to determine my bow effeciency.
Well, maybe I can start my new home business by having folks bring their bow by the house and I can determine their bow effieciency.
I had no idea this would be so difficult. And on top of that your % number would change with every change in your equipment of set-up.
I could have regular customers for that hooter shooter!
Maybe that does justify the purchase. I think I' ll run this one by the wife!

Now where to find that " virtual mass" indicator.....