NcSTAR STH432G - Manual (Page 5)

NOTE: Each click of adjustment changes the point of impact (where the bullet strikes the target) by
the amount shown on the chart below.
Windage/Elevation inches of movement per click
50 yards 100 yards 200 yards 300 yards 400yards
1/4” 1/2” 1” 1 1/2” 2”
We recommend the use of a bore sighting device to save time and ammunition when zeroing your
scope. This device will help you get on paper much quicker. Follow all of the instructions set by the
manufacturer of your bore sighting device very carefully. Once you have achieved a relative zero by
way of bore sighting, it is still necessary to shoot your firearm to ensure an accurate zero.
 CAUTION: ALWAYS BE SURE TO REMOVE THE BORE SIGHTING DEVICE FROM YOUR
FIREARM BEFORE SHOOTING ANY LIVE AMMUNITION. FAILURE TO DO SO CAN
RESULT IN DAMAGE TO YOUR FIREARM, OR INJURY TO YOURSELF AND THOSE
AROUND YOU.
With some firearms it may not be possible to use a bore sighting device. In this case it will be
necessary to use a more traditional method of zeroing.
 WHEN OPERATING ANY TYPE OF FIREARM ALWAYS USE PROPER EYE AND EAR
PROTECTION. BE SURE TO USE YOUR FIREARM IN AN AREA THAT IS PERMISABLE
UNDER LOCAL, STATE, AND FEDERAL LAW.
1. From a steady rest position (such as a shooting bench) fire three to five round groupings at a
100 yard target.
2. Observe where the bullets have struck the target and adjust the Windage and Elevation as
necessary until your point of aim matches your point of impact. Remember, at 100 yards each
click of adjustment will move the crosshairs of the scope roughly 1/2”.
3. Your firearm and scope are now zeroed for 100 yards. To change the zero distance of your
scope you can adjust the Elevation and Windage turrets as needed according to the ballistics
of the cartridge load you are using
4. Your Mark III Tactical scope is also equipped with a
Bullet Drop Compensator (Fig. 6). A Bullet Drop
Compensator (BDC) is designed to compensate for the
natural gravitational pull on the bullet as soon as it
leaves the barrel. If you look closely at the BDC you will
notice that it is marked one through five. Each number
is represented in increments of 100 yards. So whatever
distance you are shooting at, simply turn the BDC knob
to the closest BDC range in 100 yards increments.
NOTE: Since altitude, temperature, wind, rain, and other climatic conditions affect trajectory, you
may experience some slight deviation in the exact settings of your scope from one shooting
session to the next. Also, different cartridge brands, loads, and bullet weights will result in
different points of impact.