Quick Answer
Zero a chassis rifle by starting at 100-150 yards, adjusting the scope for a 1-2 MOA (minute of angle) group. Use the "hold over" method to compensate for bullet drop, then refine the zero by shooting at longer distances. Repeat this process to achieve a precise zero.
Preparing for Zeroing
Before zeroing your chassis rifle, ensure the scope is properly mounted and the rifle is at a comfortable shooting position. Use a high-quality scope level or adjust the scope’s zero stop to prevent over-travel. Set the scope’s parallax adjustment to your estimated shooting distance and ensure the reticle is sharp and clear.
Zeroing Technique
To zero your chassis rifle, start by shooting at a target at 100-150 yards. Adjust the scope’s elevation and windage adjustments to bring the reticle to the center of the target. Measure the group size and adjust the scope accordingly to achieve a 1-2 MOA group. Use the “hold over” method to compensate for bullet drop at longer distances, then refine the zero by shooting at longer distances. For example, if you’re using a 6.5 Creedmoor with a 140-grain bullet, you can hold over 3-4 MOA at 300 yards.
Refining the Zero
Once you’ve established a rough zero, refine the zero by shooting at longer distances. Use a ballistic calculator or shooting software to determine the exact hold over for your specific cartridge and shooting conditions. Shoot at distances of 200-400 yards, making adjustments to the scope as needed to achieve a precise zero. Use a spotting scope or rangefinder to accurately measure the target distance and make adjustments accordingly. Remember to always follow safety protocols and use proper shooting techniques when zeroing your rifle.
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