After getting a bow that fits you , this is probably the MOST important thing to do , get the properly spined , consistant arrows , that is .

Does it make a diferance , yes a HUGE diferance . I shoot simmilar seccs to you and would say if you are shooting a head heaveyer than 75 grains you are probably underspined , where you dont want to be . I believe if you tryed the 2315s you would be much more accurate , especialy if you are shooting fixed broadheads that are 100 grains or heavyer . Remember its far better to be slightly overspined than slightly underspined , in fact most will say its better to be grossly overspined than slightly underspined , especialy when shooting fixed broadheads out of a compound bow with a release .