Quick Answer
To adjust a scope for different shooting distances, you need to parallax adjust, set the reticle's subtensions, and make minor adjustments to the scope's zero stop. This process requires understanding your scope's specifications and the trajectory of your ammunition. Familiarize yourself with the scope's adjustment mechanisms and sight in your rifle at various distances.
Parallax Adjustment
Parallax adjustment is crucial when switching between close and long-range shots. If your scope’s parallax adjustment is not set correctly, your reticle will appear to shift between the target and the surrounding environment. To adjust parallax, look through the scope and focus on the target’s center. Turn the parallax adjustment knob until the reticle appears to be in the same position relative to your target, regardless of the distance.
Zero Stop and Reticle Subtensions
The zero stop is a feature on many scopes that allows you to quickly return to your rifle’s zero point. When shooting at varying distances, it’s essential to set the reticle’s subtensions, which are the measurements between the reticle’s markings. For example, if your scope’s primary reticle has a subtension of 1 MOA (1 minute of angle) between each marking, you can use this information to estimate holdovers for different distances. For a 100-yard shot, aim for a 2-inch holdover, and for a 200-yard shot, aim for a 4-inch holdover.
Minor Adjustments and Sight-Ins
After parallax adjustment and setting the reticle’s subtensions, make minor adjustments to the scope’s zero stop and sight in your rifle at various distances. Start with a close shot, such as 25 yards, and adjust the scope’s elevation and windage screws accordingly. Gradually increase the distance to 50, 100, 200, and 300 yards, making minor adjustments to the scope as needed. Take note of the holdover values for each distance and use this information to fine-tune your shooting.
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