Take a sharpie and number your arrows and you'llbe ableto see if it's you or if it's the same couple ofarrows. Are all of your arrows the same type and spine? I have a couple of different types of arrows and some weight about 100 grains more than the others. They fly to the same spot out to about 25 yards, by the time they go 40 yards the heavier ones drop about 8" more.