This year i swiched to the new easton flatline arrows, they are 6.5 grains per inch, my bow is 60#..... 28 1/2" draw and i'm only shooting 294 fps, last year i shot epics they were 8.6 gpi with the same set up i shot 260....the lighter arrows give you more speed but they are not as strong...i've broke two already. I like shooting lighter better because i think they shoot smoother. I say use what you can hit with consistantly. Good luck.