A few years back I used to use my Nerf guns all the time, I think I have around 7-8 and I think they are very great. I always liked going for longshots to hit my target board on the other side of the house. I would lie down on my stomach and to hit direct center I would have to aim a little higher than the target so i would hit a bulls eye. The reason why would be because of gravity pulling down on the dart as it leaves the barrel at 9m/s2. To make things more complicated doing a shot to hit the target outside is even more difficult because if their is wind you cant aim directly at the target, you would most likely ahve to aim anywhere but the target to land direct center.