As to BJR's comment of a bullet traveling in a corkscrew path, I tend to agree with that. As a lad I had a 22 cal pellet pistol with such a low muzzle velocity that you could see the pellet fly, and it sure did have a corkscrew trajectory. I think the illustration of the hunting rifle and the targets may also be because you sight your gun in to be accurate at a certian range. So the bullet when it first leaves the barrel which is of course lower than the scope but since it is on its way up so it will have dropped to the target the second target gets hit high.

Calvi