I believe I said this not Arthur, I think Arthur shoots heavier arrows than that. When I did this test with MY bow and MY set up it showed I had a maximum efficiency at around 450 grns. Every set up will be slightly different.
And my tests had nothing to do with performance on game. They were simply measuring the amount of penetration (depth) I could get with different arrows in a consistent medium.
Paul, I'm having a little trouble with the quote. Are you saying a bows efficiency isa direct measure of penetration?It definately is part of it. A bows efficiency as I understand is the the bows ability to transmit max energy to the arrow and not loose energy to other things such as vibration, noise, friction, etc.. A
heavier arrow is able to absorb more of the bows energy then a lighter weighted arrow thus making the bow
more efficient.