We did a similar test a different way a couple of years ago. i wanted to give a friend of mine a bow built by Balenger that was different than his current bows, more reverse in the handle with a multi-radiused laminated handle, 68" i believe it's 51 pounds at 28". My son was home and in peak form. i told him too help me check out the bow to see if he thought it would a good one for Mickey. At twenty yards he was stacking tighter groups with cedar tapered shafts than thought was possible and he was tearing them up pretty bad so i told him to back up. That put him into the neighbors yard, shooting under the horizontal of my 6' 3" clothesline bar. he was getting plenty of clearance, he backed up further and was getting about 6 to 8 inches of clearance under the bar. I got an idea for him to test other arrows. We tried 1818s and 1918 with 145 grain points, which were noticeably heavier than the cedars. The difference of clearance was almost no different. I expected that he would either hit or have to shoot over, but no, a couple of inches closer was all I could see. Personally I would need to break out my FITA target bow to shoot that consistently, but all we were really trying to decide as to which arrows I should give along with the bow. The very little difference in arc was discovered as accidental observation. Now this is an exceptional bow, I often wonder if this same scenario is always just a product of initial speed or if this varies from bow to bow because of design or limb mass.