ive been shoting 7595or i think a 350 spine arrow from 55 to 73 lbs and i have not seen any weird arrow flight.and i shoot goodish,i still have to comp for my shaky right hand,but i get inthe kll zone.i do know what your talking about with that movement.i think i see it but i have had 4 people stand around me and say they dont see what i see.