I am shooting a Reflex Gamegetter with 27 inch draw, about 65# draw weight. I shoot 28 inch CX Terminator Hunter arrows with 3 4 inch feathers and 100 grain tips through a WB rest. I have tried straight helical and left and both had my arrows fling like crap. The back end like swings in circles and the front stays about the same. What do I need to do to fix this? Any ideas would be appriciated. Thanks for your time.