How to adjust a rifle scope for windage and elevation
A properly zeroed rifle scope places the bullet’s point of impact where the reticle indicates. Windage moves the impact horizontally, while elevation changes it vertically. Learning how these adjustments work makes sighting in a rifle more predictable and helps you diagnose problems before changing several settings at once.
Begin with a safe, stable setup. Keep the rifle pointed in a safe direction, remove the magazine, and confirm the chamber is clear whenever the firearm is not being actively used. Follow the range’s rules, use appropriate eye and hearing protection, and ensure the ammunition matches the rifle.
The optic should be securely mounted, properly aligned, and adjusted for comfortable eye relief. A loose scope, uneven rings, or an unstable shooting position can create groups that appear to need correction even when the turrets are working correctly.
Prepare the rifle and optic
Check that the scope rings and base are tightened according to the manufacturer’s specifications. Excessive force can damage the optic or mounting hardware, while insufficient tension may allow the scope to shift during recoil. Inspect the reticle for a clear image and set the magnification to a practical level for the initial zero.
A rifle’s cartridge also affects the sight-in process. Rimfire and centerfire ammunition can have different trajectories, recoil characteristics, and effective ranges, so the optic should be zeroed with the ammunition you intend to use. This overview of rimfire and centerfire rifles can help explain why those categories should not be treated as interchangeable.
Select a target with a clearly defined aiming point and use a solid rest, such as front and rear bags or a properly supported bench. Avoid resting the barrel directly on a hard surface, since that can affect barrel harmonics and point of impact.
Learn what the turrets control
Most scopes have two adjustment turrets. The elevation turret is commonly located on top of the scope and controls vertical movement. The windage turret is usually on the right side and controls horizontal movement. Some optics use capped turrets, while others have exposed target-style controls.
Turrets are generally marked in MOA or MRAD. A common quarter-MOA click changes the point of impact by approximately 0.26 inches at 100 yards, while a tenth-MRAD click changes it by about 0.36 inches at that distance. The actual correction depends on the scope’s specifications, so read the manual before calculating adjustments.
The arrows and labels indicate how the manufacturer intends the point of impact to move. If shots are striking low, elevation is generally adjusted toward “up.” If shots are striking to the right, windage is generally adjusted toward “left.” Confirm the markings rather than relying on assumptions, as turret designs vary.
Establish a careful zero
Start at a short distance if the rifle has never been sighted in or if you are unsure whether the scope is aligned with the bore. A close-range target makes it easier to determine whether the shots are on paper. Once the group is located, move to a standard distance such as 100 yards, or another distance suited to the cartridge and intended use.
Fire a deliberate group rather than adjusting after every shot. Three shots may provide a preliminary indication, while five shots give a more useful picture of the rifle and ammunition’s consistency. Allow the barrel to cool as needed, especially with lightweight sporting rifles that can shift point of impact as they heat.
Measure the center of the group from the desired aiming point. Do not chase individual holes. A single pulled shot can lead to an unnecessary turret correction and make the zero less consistent.
| Observation at the target | Adjustment to make | Verification |
|---|---|---|
| Group is low | Apply the elevation correction marked toward “up” | Fire another group |
| Group is high | Apply the elevation correction marked toward “down” | Confirm vertical placement |
| Group is right | Apply the windage correction marked toward “left” | Check horizontal placement |
| Group is left | Apply the windage correction marked toward “right” | Confirm windage |
| Group is large or scattered | Check support, ammunition, mount, and shooting technique | Correct the cause before dialing |
Apply windage and elevation corrections
Calculate the correction using the distance between the group center and the aiming point. For example, at 100 yards, a four-inch horizontal error requires approximately 16 quarter-MOA clicks, or the equivalent adjustment shown by the scope. At a different range, the value of each click changes proportionally.
Make one type of correction at a time when possible. Correct elevation first, then windage, or use a measured diagonal correction if the scope instructions support it. Record the original turret position and the number of clicks applied so you can return to the previous setting if necessary.
After each adjustment, fire another group using the same hold, ammunition, and target. If the group moves in the opposite direction, stop and confirm the turret markings. Avoid turning the turrets repeatedly without shooting, since excessive changes make it difficult to identify the actual correction.
Confirm the zero in real conditions
Once the group is centered, fire a confirmation group after allowing the rifle to settle. Check that the mounting screws remain secure and that the scope has not moved. A reliable zero should produce a consistent group, not just one bullet landing at the center.
Outdoor conditions can influence results. Wind affects the bullet during flight, especially at longer distances, while temperature, ammunition lot, barrel heating, and shooting angle may also change the point of impact. Record the ammunition, distance, weather, and final turret settings in a range notebook.
If the rifle groups consistently but the center shifts, a true adjustment may be appropriate. If the group is wide, irregular, or changes dramatically between strings, investigate mechanical or ammunition issues before making more scope corrections.
Build a repeatable sight-in routine
Use these practices to make future zeroing sessions more efficient:
- Verify the rifle is unloaded before handling the scope, mount, or bore.
- Use the same ammunition for sighting in and regular practice whenever practical.
- Measure the group center instead of correcting from a single shot.
- Count clicks and write down the final windage and elevation settings.
- Recheck zero after transporting the rifle or removing and reinstalling the optic.
After the final group, replace turret caps if the scope uses them and store the rifle according to local requirements and the manufacturer’s guidance. A documented zero makes it easier to identify whether a later change comes from the optic, ammunition, environment, or rifle setup.
For compatible rifles, optics, ammunition, and shooting accessories, browse the Guns and Magz catalog with your intended use and cartridge in mind. Careful preparation, measured adjustments, and repeated confirmation will help you get the most dependable performance from your rifle scope.