SL,
I agree, it doesn't matter if you are shooting uphill or downhill, the effect is the same. But, I don't agree with compensating up.

I was sighted in about 3" high with that load at 100. Since I was shooting downhill, the bullet does not drop as much as it would if I were shooting on flat ground. So, I aimed low. Problem was, I aimed to far low. Are you saying the same thing, or do we have an arguement???