Okay, my buddy and I were shooting last night, and he noticed that my arrows were flying funny when I was shooting. First I'll describe my set-up and then I'll explain my thoughts, then maybe some of you may have suggestions on what the problem may be. I'm shooting a Hoyt MagnaTec: 65lb draw weight with a 31" draw length. The arrows are Gold Tip XT 5575 arrows (27") with 100 gr. tips. 3 - 4" vane fletchings The total weight of my arrows are around 369 gr. including all components. The bow shoots approx. 269 to 275 fps. When I went on the following site to calculate what minimum weight arrow I should be shooting, it looked as if I may need more weight, but I don't know for sure. I also was not sure what they meant by "ENERGY" cam vs. "SPEED" cam? My bow is a single cam bow...Hoyt's Versa Cam. I plugged the mumbers in for Energy cam. heres the link... http://www.huntersfriend.com/arrowhelp/AMO-Minimum-Arrow-Weight-Chart.htm What my arrow is doing: The arrows group well and hit where I'm aiming, but the ass end of the arrow seems to fling around some, causing the arrows to enter the target at an angle instead of straight in. It gets worse as I increase my shooting distances. My thoughts: I'm thinking that the arrows need to be heavier or I need a stiffer spined arrow? If I add weight, does it matter where I add the weight? Front or rear or is front my only option? Or should I try a heavier arrow all together. I think heavier in the front may just make the back end fling even more. I know I'll probably just end up going to the archery shop for assistance, but wanted to hear some feedback from you guys first. OOps...I left out that I'm using a NAP drop away rest. Thanks in Advance Guys!