just what i needed somethin else to worry about, if a deer is standing 27.4 yrds out he's 36" tall at the shoulder, the platform for my stand is at 19'3" i'm 5'10" and i weigh 215lbs and the wind is from the north and i'm shooting 100gr mechanical bh's, with a release, my bow is shooting 278fps, and the hillside i'm hunting is a 13.6% grade, should i use my 30 yrd pin and shoot low or my 20 yrd and aim high[&o], cause if i got to buy a scientific calculator for this the wife is gonna have a cow[]