Quick Answer
You should sight in your scope before every hunting season to ensure accuracy and performance, but the frequency of re-sighting depends on various factors including scope type, rifle wear, and environmental changes.
Sighting-In Basics
Sighting in your scope is a crucial step in preparing your rifle for hunting. However, it’s essential to understand that a one-time sighting-in at the factory or during initial setup may not be enough, as environmental factors and rifle wear can affect accuracy over time. To determine if you need to re-sight your scope, inspect the rifle’s barrel for any signs of wear, such as scratches, dents, or corrosion. If the barrel is in good condition, you can consider re-sighting your scope every 1-2 years, depending on usage and storage conditions.
Environmental Factors Affecting Accuracy
Changes in temperature, humidity, and altitude can affect your rifle’s accuracy, requiring adjustments to your scope’s zero. For instance, a 10°F change in temperature can alter your rifle’s point of impact by up to 1 inch at 100 yards. If you plan to hunt in extreme environments or travel to different elevations, re-sighting your scope before each trip may be necessary. In such cases, it’s best to re-zero your scope at the new location to ensure accuracy.
Re-Sighting Techniques
To re-sight your scope, follow these steps: (1) Use a high-quality sighting-in target, such as a 12x25-inch target at 100 yards. (2) Set your scope to the original zero mark. (3) Fire a few shots to establish a new zero, taking note of any deviations from the original zero. (4) Adjust your scope’s windage and elevation until you re-establish the original zero. (5) Repeat the process to confirm your new zero.
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