ORIGINAL: Ridge Runner

well the cals mentioned will work, but let me say, for 600 yards, they're not needed. In the land of long range High BC bullets will outrun velocity every time. Those with ballistic programs try it, you'll see what I'm talking about. the elevation is just simple math, the hard part is figuring the wind, and a high BC heavy for caliber bullet has 1/3 less wind drift that a regular hunting bullet even at lower velocity.
RR