Quick Answer
To zero a hunting rifle after replacing a scope, first ensure the rifle is at the same elevation and position as when the original scope was zeroed. Next, set the new scope to the same height as the original scope, and then adjust the new scope's windage and elevation to match the original zero. Use a laser boresighter for accurate initial adjustments.
Initial Setup and Preparation
Before starting the zeroing process, ensure the rifle is on a stable shooting platform, and the scope is securely tightened to the rifle’s receiver. Remove any scope covers or lens caps and ensure the rifle is at the same elevation and position as when the original scope was zeroed. If you’re unsure of the original zero, consult the manufacturer’s documentation or contact a professional.
Using a Laser Boresighter
A laser boresighter is a valuable tool for accurate initial adjustments. To use one, attach it to the barrel of the rifle and set the scope to a high power setting (usually 4x or 6x). Hold the rifle at the desired shooting position, and the laser will illuminate the target, showing you where the bullet will impact. Use this information to make initial adjustments to the scope’s windage and elevation.
Zeroing the Rifle
With the initial adjustments made using the laser boresighter, start the zeroing process by adjusting the scope’s elevation first. Start with small adjustments (0.25 MOA or 1/4 MOA clicks) and verify the shot impact with a shooting mat or a spotting scope. Once the elevation is close, adjust the windage to match the original zero. Use a sighting-in target with multiple aiming points to help you accurately adjust the scope.
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