Zeroing your .308 Winchester rifle at 50 yards is a crucial first step in achieving accuracy at longer ranges. While some might skip this step, understanding the process and its implications is key to becoming a proficient shooter. This guide provides a detailed walkthrough, addressing common misconceptions and offering tips for success.
Why Zero at 50 Yards?
Many shooters opt for a 50-yard zero for their .308s because it provides a good compromise between close-range accuracy and longer-range trajectory. At this distance, the bullet's trajectory is relatively flat, meaning the point of impact (POI) is closer to the point of aim (POA). This makes it easier to dial in your scope and understand your rifle's performance. A 50-yard zero often translates to a reasonably usable zero out to 200-300 yards, depending on your specific ammunition and rifle.
Equipment and Preparation: What You'll Need
Before you begin, ensure you have the following:
- A .308 Winchester rifle: Clean and properly maintained.
- A properly mounted scope: Make sure your scope is securely attached and properly sighted in (or at least close).
- Ammunition: Use the same type and lot of ammunition you intend to use for hunting or target practice. Consistency is paramount.
- A stable shooting rest: A sturdy rest (bipod, sandbag, etc.) will significantly improve your accuracy.
- Targets: Use targets with clear aiming points, ideally at least 12 inches in size at 50 yards.
- Hearing and eye protection: This is absolutely non-negotiable.
- Tools: A screwdriver might be needed for scope adjustments.
The Zeroing Process: A Step-by-Step Guide
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Prepare your shooting position: Find a stable shooting position using your chosen rest. Ensure your rifle is level and comfortable to hold.
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Aim and fire a three-shot group: Focus on consistent and proper shooting technique. Avoid rushing and ensure you're comfortably settled before firing.
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Assess your shot group: Observe where your shots landed on the target. Note the vertical and horizontal displacement of the group's center from your point of aim.
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Adjust your scope: Most scopes use a system of clicks to adjust elevation and windage (up/down and left/right). Each click usually corresponds to a specific amount of MOA (Minute of Angle) or inches at a given distance. Consult your scope's manual to determine the click value. Make the necessary adjustments based on your shot group's deviation from your point of aim. Remember that "up" on the scope dial moves the point of impact down on the target and vice versa.
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Repeat steps 2-4: Fire another three-shot group after making adjustments. Continue this process until your group is centered on your target's aiming point.
Understanding MOA and Adjustments
Minutes of Angle (MOA) is a common unit of measurement for scope adjustments. One MOA is roughly equivalent to one inch at 100 yards. So, if your shots are consistently one inch low at 50 yards, you'll need to adjust your scope's elevation by 0.5 MOA. Always refer to your scope's manual for precise adjustment values.
Fine-Tuning and Beyond 50 Yards
Once your rifle is zeroed at 50 yards, you can proceed to test its accuracy at longer ranges. Keep in mind that bullet drop will become increasingly significant beyond 50 yards. This is why understanding ballistic data for your specific ammunition is crucial for making accurate shots at greater distances. Consider using a ballistic calculator to predict bullet drop and plan your adjustments.
Conclusion
Zeroing your .308 at 50 yards is a vital skill for any shooter. By following these steps and understanding the principles involved, you can achieve accuracy and confidence in your shooting abilities. Remember safety first, and enjoy the process of refining your skills!
