Originally Posted by
mikescooling
With archery, if your shooting up or down hill, your going to hit high. But with a flat shooting rifle, not so much; I've shot up and down hill with my 3006 and still hit the POA.
You'll hit high with a rifle too - but usually nobody shoots far enough for the shift to make much difference. It's just too difficult in most states to find a clear line of sight with significant grade far enough to matter. At 100yrds, there is no angle a guy could shoot to completely miss a deer because of the angle.
The true horizontal range is the measured LOS * cosine(angle). So if you're shooting 400yrds down a 25degree grade, that's really only 360yrds, and with a 30-06 (150grn, .446BC, 2950fps), that's a 7" miss over the POA.
