Can I Trust My Zero After Changing Optics on My Rifle?

Maintaining a Zero with Optic Changes

When changing optics on your rifle, it’s essential to ensure the new scope is aligned with the rifle’s bore. This is typically done by using a bore sighter, which allows you to align the scope with the rifle’s barrel. However, bore sighters can be inaccurate and may not account for the new scope’s position or the rifle’s movement. A more precise method is to use a laser bore sighter or a high-powered spotting scope to ensure accurate alignment.

Sighting in the Rifle with the New Optic

To sight in the rifle with the new optic, you’ll need to fire multiple rounds at a target and adjust the scope’s elevation and windage settings accordingly. A good rule of thumb is to start with a known zero distance, such as 100 yards, and fire three-shot groups to establish a baseline. Then, adjust the scope’s settings in 1/4 MOA increments, firing three-shot groups after each adjustment, until you achieve consistent hits on the target. For example, if you’re using a 1-inch scope, you can expect to make adjustments in 1/4 MOA increments, which translates to approximately 1 inch at 100 yards.

Factors Affecting Zero with Optic Changes

Several factors can affect the rifle’s zero when changing optics, including the new scope’s position, the rifle’s movement, and the type of ammunition being used. To minimize these effects, it’s essential to use a consistent shooting position, a stable rifle, and high-quality ammunition. Additionally, you should always reference a known zero distance when sighting in the rifle, and make adjustments in small increments to avoid overcorrecting. By following these steps and being mindful of the potential factors affecting the rifle’s zero, you can ensure a reliable and accurate shot with your new optic.