Thread: Downhill shot

I have never been in the situation where I had to shoot at long hunting range 300m+ downhill. I'm planning a trip where I will probably be in such situation.
I have been playing with the Hornady 4dof app and Ballistic advanced edition:
Both give the exact same elevation at 300m and 0deg (1.65 mrads).
However the Hornady 4dof app give only 0.98 mrads of elevation at 30deg while Ballistic AE gives 1.28 mrads.

Using the Rifle's man rule (cosine30deg x 300=260m) to get the true ballistic range (TBR) I get 1.26mrads. Ballistic AE result is pretty close.

Did anyone managed to practice at angle and compare shot with the Hornady 4dof? I have been using Hornady 4dof at the range, it is pretty much always bang on. I have no way to practice at angle, it would be great to know if the app is accurate enough at angles or can't be trusted.