Shooting high with a scope is a frustrating problem, but thankfully, usually solvable. This in-depth guide will walk you through the common causes of a scope shooting high and provide clear, step-by-step instructions for adjusting your scope and getting back on target. Understanding the "why" behind your high shots is crucial for a permanent fix, not just a temporary band-aid.
Understanding Scope Adjustment
Before diving into solutions, let's grasp the fundamentals of scope adjustment. Most scopes use turrets, dials that allow for precise adjustments in both elevation (vertical) and windage (horizontal). These adjustments are typically measured in minutes of angle (MOA) or clicks. One MOA equals approximately one inch at 100 yards. Knowing your scope's adjustment increments is critical.
Understanding MOA and Clicks:
| Unit | Description | Conversion (approx.) |
|---|---|---|
| MOA | Minute of Angle; 1/60th of a degree | 1 inch at 100 yards |
| Clicks | Individual adjustment increments on the turret | Varies by scope model |
Consult your scope's manual to determine the exact MOA or click value for your particular model.
Common Causes of a Scope Shooting High
A scope shooting high can stem from several sources. Let's examine the most frequent culprits:
1. Incorrect Scope Mounting
- Improper Base/Ring Alignment: Misaligned scope rings or bases are a leading cause of shooting high or low. Even a slight misalignment can significantly impact accuracy. Always ensure your bases and rings are perfectly aligned and securely tightened.
- Incorrect Ring Height: Using rings that are too high can lead to a variety of issues, including a high point of impact. Choose rings that provide the correct clearance between the scope's objective lens and the barrel.
- Loose Mounting Hardware: If your scope isn't securely mounted, it can shift under recoil, causing inconsistent point of impact. Double-check all screws and ensure they are properly tightened with the correct torque.
2. Scope Issues
- Factory Defects: While uncommon, manufacturing defects can affect a scope's accuracy. If you suspect a defect, contact the manufacturer.
- Internal Damage: A drop or impact can damage internal components, leading to inaccurate shots.
- Incorrect Zeroing: The initial zeroing process is crucial. Improper zeroing can easily lead to shooting high.
3. Ammunition and Environmental Factors
- Ammunition Variations: Different ammunition lots can have varying ballistic properties. This is especially true for handloaded ammunition.
- Environmental Conditions: Wind, temperature, and even barometric pressure can influence bullet trajectory, causing your point of impact to shift.
Step-by-Step Guide to Adjusting Your Scope
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Confirm the Problem: Before making any adjustments, verify that your scope is indeed shooting high. Fire a series of shots at a target at various distances to confirm the issue consistently occurs.
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Proper Shooting Technique: Ensure your shooting form is consistent. Inconsistent shooting form can easily mask scope-related issues.
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Start with Small Adjustments: Begin by making small adjustments to the elevation turret. Remember to record each adjustment. This systematic approach is important, especially if the scope is significantly off.
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Fire Test Shots: After each adjustment, fire several shots to assess the effect. Remember the environmental conditions and ammunition used for consistency.
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Repeat Until Zeroed: Continue adjusting the elevation until you achieve the desired point of impact at your chosen distance.
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Check Windage: Once elevation is corrected, ensure windage is properly adjusted.
Case Study: Troubleshooting a High Point of Impact
A friend recently purchased a new rifle scope and found it shooting consistently high. He meticulously checked for proper mounting, ensured his rifle was functioning correctly, and then carefully adjusted his scope's elevation turret in small increments. After several test shots and careful adjustments, he corrected the high point of impact. The issue turned out to be a combination of slightly misaligned scope rings and improper initial zeroing.
Preventative Measures
- Proper Mounting: Invest time in correctly mounting your scope. Precise alignment of rings and bases is paramount.
- High-Quality Equipment: Use high-quality scope rings, bases, and mounts from reputable manufacturers.
- Regular Maintenance: Regularly inspect your scope mounting hardware for looseness and ensure your scope remains free from damage.
Conclusion
Adjusting a scope shooting high requires patience, methodical adjustments, and careful observation. By understanding the potential causes and following the steps outlined above, you'll get your scope zeroed and back to accurate shooting. Remember, if you are struggling, seek assistance from an experienced shooter or gunsmith. They can provide valuable guidance and identify issues you might have missed.