Scope Tracking: Tall Target Test | Applied Ballistics with Bryan Litz

The Tall Target Test is crucial for verifying scope tracking accuracy and identifying cant errors before long-range engagements. Bryan Litz demonstrates how to perform the test, emphasizing precise leveling and accurate rangefinding. The test helps calculate correction factors for scope tracking errors, ensuring consistent bullet impact at extended distances.

Quick Summary

The Tall Target Test verifies rifle scope tracking accuracy and alignment for long-range shooting. It involves shooting at a tall target, dialing elevation, and checking vertical tracking against a plumb line, crucial for identifying cant and mechanical errors.

Chapters

  1. 00:00Introduction to Long-Range Accuracy & Tall Target Test
  2. 00:34How to Perform the Tall Target Test
  3. 02:12Importance of Leveling for Cant Errors
  4. 03:53Range Verification and Demonstration
  5. 06:41Calculating Scope Correction Factors
  6. 09:22Troubleshooting Scope Tracking Errors

Frequently Asked Questions

What is the purpose of the Tall Target Test in long-range shooting?

The Tall Target Test verifies a rifle scope's vertical tracking accuracy and alignment. It helps identify mechanical errors in the scope or mounting system by comparing the expected point of impact shift with the actual impact after dialing elevation.

How do you perform the Tall Target Test?

After zeroing at 100 yards, you shoot a group at a tall target's bottom aim point. Then, dial a significant amount of elevation (e.g., 30 MOA) and shoot another group to check vertical tracking against a plumb line.

Why is using a carpenter's level important for the Tall Target Test?

A carpenter's level ensures the target line is perfectly vertical. This prevents cant errors, which can cause significant windage shifts when dialing elevation at long distances, leading to misses.

What formula is used to calculate the expected point of impact shift?

The formula is: Expected Point of Impact Shift = Range (yards) x Dialed Elevation (MOA) x Constant (0.01047 for MOA). This helps determine the scope's tracking error percentage.

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