I found setting your zero at 150 yd. you will be roughly 1 1/2" to 2" high at 100 yd. and around 3" to 4" low at 200 yd. this will eleminate hold over an keep you in the bread basket. I can hit a water jug holding on the top inch or so at 250 yd. Ya need to really shoot these yardages if you intend on taking game at these kind of distances, I'm sure sabotloader will chime in with some charts.