What Should I Do If My Rifle Keeps Losing Zero?

Checking for Misalignment

When inspecting your rifle, start with the scope’s mounting rings. Check that they are tightened evenly and not loose. Use a torque wrench to tighten the rings to 30-40 inch-pounds. Next, inspect the scope itself for any wear or damage to the adjustment mechanisms or the objective lens. Check the rifle’s action for any signs of wear or misalignment, such as loose screws or uneven bedding. Use a scope level tool to ensure the rifle’s action is level and the scope is properly aligned with the rifle’s bore.

Adjusting and Resetting the Scope

If the scope is properly aligned, check the rifle’s zero by firing a group of shots at a target. Measure the group’s center point to determine the rifle’s current zero. Compare this to your desired zero, and make adjustments as needed. Start by adjusting the scope’s windage (left-right) to center the impact on the target. Then, adjust the elevation (up-down) to bring the impact to the desired point of aim. If you’re resetting the scope to its manufacturer’s recommended settings, you may need to adjust both windage and elevation. Make small adjustments (about 1/8 MOA) and recheck the target after each adjustment.

Maintaining a Consistent Zero

To maintain a consistent zero, it’s essential to avoid over-tightening the scope rings or using excessive force when adjusting the scope. This can cause the rings to become over-tightened and the scope to become misaligned. Regularly inspect your rifle and scope to catch any potential issues before they become a problem. Consider using a scope level tool or a laser bore sighter to ensure the rifle’s action is level and the scope is properly aligned with the rifle’s bore.