I am thinking about the bowtech liberty at 80lb. 29" draw based on some of the reports that the cam feels like you are pulling a lot less. I currently have a patriot dually with a pretty stiff draw curve that I don't have any trouble drawing at 70lbs. I don't have a nearby dealer that stocks the bowtech line, so it is basically a order-only proposition. I am interested to know if someone could estimate the speed gain I would get out of the 80lb-29"liberty vs. the 70lb-29" with equal arrow weights.

Ibo at 70lb-30" with 350gr = 308
70lb-29 with 350gr = ????
80lb-29 with 350gr =???? (I know this is less than 5gpp)
80lb-29 with 400gr =????

I am actually shooting a 440 gr. arrow at about 289 out of my dually, would the 80lb liberty be close?

Any help would be greatly appreciated. I love the bowtech lineup, its just so hard to decide!!!!

Dennis