Arthur, havent had a chance to experiment with different weight arrows yet but I have shot the same arrow through two different bows 360 grain arrow at 310 fps hit dead with in 2 inches of the bullseye out to 37 yards, same arrow at 290fps could only do it to about 27 yards. Granted they were two diffent bows but I would think going to a heavier enough arrow to loose 20fps the trajectory would suffer even more.