ORIGINAL: DropTine249
Like stated above, say you were shooting a rifleat a deer up a 30degree slop, 150yards away, you would probably aim as if that deer were at 100yards out. So, in those cases, I think the ARC range finders would be a viable asset.
This is the part I dont understand, LOS is what you want, 150 yards is 150 yards because that is how far that bullet needs to travel, whether you are standing on flat ground or you are stand on a 30degree slope.
Take a normal bullet trajectory (like the ones on an ammo box) now take that trajectory and tilt it up 30 degrees, what has changed? the angle, thats it, the bullet is still going to fly the same (or arrow) unless you air shooting it straight up in the air.
But take into account I am a flatlander also, so this is all hypothetical for me

well the tree stand part isn't