NcSTAR STM3942GV2 - Manual (Page 5)

The Windage Adjustment turret is located on the right
side of the scope body. This Windage Adjustment is an open
Target style turret for ease of access (Fig. 5).

Twisting the Windage Adjustment Counter-Clockwise will
move the crosshairs to the Right, moving your bullet
impacts Left.

Twisting the Windage Adjustment Clockwise will move the
crosshairs to the Left, moving your bullet impacts Right.
Figure 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 shot
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 Gen 2 scope is also equipped with a Bullet Drop Compensator (top
turret in picture in 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