well this is what ive got.2010 bengal set with acutrac cams,stock string,the roller ccs,and the sts.28.5 draw length.shooting at 73 pounds.my arrows are goldtip pro hunter seires 0.001 straightnes.100 grain field tip.arrows are rated 75-95#.how can i figure out what fps im shooting at.i know its fast and i am verry happy with it.but i am just looking to know more about my bow.