HM, that is exactly what I am thinking. I can't remember the numbers off the old arrows, but I do remember them weighing in at about 8 gpi. These new arrows weigh 10.4, and I am stepping up to a 125 gr. broadhead from a 100. my bow pulls 50# at 28". My draw length is somewhere around 30" so I will guess somewhere around 53-55lb pull at that draw length. Hopefully i will get some time to try out this new setup and see if it is any better.