I can see a flaw in that math. Bow design has a lot to do with it. What I mean; I can make a flat bow that pulls say 50lbs. I can then take that same bow and relex the tips. I can add about 10lbs to the draw. Reason, it causes the bow to stack different than it did when it was flat. Samereason recurves stake by about 2more lbs per inch than a longbow. Also, If I tiller a bow to stack out at a given draw lenght, it will stack a lot more beyond that point.In comparison to a bow tillerd to, say 28 " and a shooter shooting 26". It will stack much less per inch than if I had tillered it to 26 " at a given weight.