Geometry v/s Gravity
From a steep angle it can be very different. I take a target out to my stands before the season opens and place it at different spots and shoot from my stand to absolutly know the range of my shooting spots. THen I can compensate if needed in between. On one field stand on the edge of the woods, I even take a weed eater with a rope tied to the stand, check the range by shooting and then cut a semi-circle into the food plot right to the ground. Two marks for first and second pin and there is no guess work out there for the whole season.