JeffB-
I mention draw weights because the cams are used on bows with a variety of draw weights with different limb deflections. When you say lighter arrows, I'm wondering if the better terminology would be "lighter grains/pound"? Otherwise, what constitues "lighter" for the different poundage bows? You'll certainly be using a much lighter IBO arrow on a 55# bow as you would on a 70# bow.
I know Norb has stated many times: <BLOCKQUOTE id=quote<font size=1 face='Verdana, Arial, Helvetica' id=quote>quote:<hr height=1 noshade id=quote>"The dynamic efficiency of the bow and arrow combination is affected by the weight of the arrow. Lighter weight arrows are launched with lower efficiency than heavey arrows. This is an inescapable fact of physics."<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face='Verdana, Arial, Helvetica' size=2 id=quote>
I would agree with Norb in a physics sense, but I don't doubt your findings on the BKII- that's why this is very interesting to me! I want to know more....