Re: High Angle Training Materials
Here is what you can say,
The distances shot by the M16/M4 effectively, and by that I don't mean max effective range, but normal effective ranges as it is employed, <span style="font-style: italic">(caveated that there are exceptions to every rule)</span> will only cause minor variations in your hold for any given distance. The bullet is effected by gravity and not the linear distance across the ground. So the degree of the angle matters most, as well the distance which it is acted on by gravity.
To illustrate this, I had this on my iPhone so excuse the crude nature, but it shows how the distance is effected by the angle, roughly.
Lines are all equal, for demo, say 1000 yards long. But the gravity distance is only 800 yards on the angle.
For a full size target hold low, regardless of the shot, uphill or downhill, and for a full size target recommend aiming at the stomach/balls... for partially obscured targets more care will have to be take, but again, holding low.
You can read something like Sierra's article on angle shooting for details, but for combat, holding low works. Google should help... but this should give you something. With an ACOG you're not gonna be running numbers and doing the math so hold low.