Carbon Express makes Terminators in 2 sizes 4560 and 6075. I'm assuming you mean you are shooting the 6075. In either case, the terminator arrows are very heavy arrows. The 4560's are 9.5 grains per inch while the 6075's are 10 gpi. I'm not sure where you got the 6 gpi figure from. You can check the Carbon Express website for their arrow setup guide. The 6075's aremuch too stiff for your setup. As far as total arrow weight you have nothing to worry aboutsince you are probably over 7 grains per pound of draw weight. Like I said, Terminators are some of the heaviest carbon arrows you can buy.