Let's say I'm shooting at a target at the top of a stand that's located 100 yards away horizontally, and 20 feet tall. How do I account for the height of the target? Assume my rifle is perfectly accurate and perfectly sighted in for 100 yards, and there is no wind. My first thought was to aim high, but after thinking about it more, I thought you'd want to aim dead on for the horizontal distance. After further pondering, I'm starting to think I'd want to aim dead on, but on the line-of-sight distance (along the hypotenuse of the triangle), which is a bit higher than dead on for the horizontal distance. But that doesn't seem right, either. My reasoning is that the bullet will take some number of seconds (n) to reach the target, and in that time, it will drop 1/2*32.2*n²*12 inches below the muzzle line of sight, and that distance is the same regardless of whether you're shooting horizontally or at an elevated angle. Like I said, that doesn't feel right. It seems like I should have to take the angle into account. Here's my sample scenario: As you can see, the line of sight distance is only off by 4 feet, which is a negligible correction at 100 yd, but hopefully you get the idea.