Note: Once you get out to 40, you may notice that the fletched shafts are now hitting lower than the bare ones. Drag is taking its toll. Disregard.
Very good point. One that I almost forgot. Besides coming in low at long distances, they (fletched arrows) may also be just to the right (show underspined) because of very slight changes to do theadditional weight added to the back of the arrow (glue, fletch). If you use cresting or wraps, leave them on the bareshafts.