If your rifle is scoped with a single crosshair it is valuable to sight in your rifle at Max Point Blank Range (MPBR) for hunting so that all you need to think about is taking the shot, in most cases. MPBR is the maximum distance that your rifle bullet will fall three inches below the point of aim or rise above point of aim by three inches. By using the JMB ballistics program for Trajectory below you can calculate bullet drop and rise if you know bullet speed, the ballistic coefficient of your bullet. Set the target height at 6 inches and the vital zone radius at 3 inches in the spaces provided in the calculator. At the last part of the calculator check the box for Elevation correction for Zero Range and the box for Zero at Max Point Blank Range. Hit Calculate. The results will show the height of your bullet at its highest (three inches) and the MPBR distance where it is 3 inches low. The Savage 11/111 7mm Rem Mag with Nosler 140 grain E-Tips I am testing has a MPBR of 294 yards and the bullet reached its 3 inch max height at around 140 yards.
http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
Typically at 100 yards the bullet will hit the target at 2.5 inches high or so and peak at around 140 to 150 yards for a fast spitzer bullet traveling above 2800 fps.
At 25 yards your bullet will hit the bullseye. At 50 yards it will hit an inch high so if your shooting in the thick stuff your bullet will be right on target and the deer will never know what hit ’em. Or if you have to shoot farther you are good to go by staying in the Vital area.
Give it a try!
Good Hunting!