Home Defense Rifle Application

Published on October 3, 2025
Duration: 6:33

This video explains the critical concept of height over bore for home defense rifles. It demonstrates how the distance between your optic and barrel affects bullet impact at various ranges. Proper zeroing and understanding holdovers/unders are essential for accurate engagement, especially at close distances where aiming directly at the target may result in a miss due to this phenomenon.

Quick Summary

Height over bore is the vertical distance between your rifle's optic and barrel center. For home defense, understanding this is vital. At close ranges (e.g., 7 meters), you may need to aim above the target's head to compensate for height over bore and achieve a center mass hit. At your zero distance (e.g., 25 meters), aim directly. Beyond that, use hold unders; before that, use hold overs.

Chapters

  1. 00:00Importance of Zeroing
  2. 00:14Introduction to Height Over Bore
  3. 00:24Demonstration Rifle Setup
  4. 00:55Why Height Over Bore Matters
  5. 01:07Close Range Aiming Error
  6. 01:46Correct Close Range Aiming
  7. 02:22Varying Distances and Hold Offs
  8. 02:36Zero Distance Explained
  9. 02:55Demonstrating Hold Overs/Unders
  10. 03:067 Meter Shot
  11. 03:1212 Meter Walk Back
  12. 03:2625 Meter Shot (Zero Range)
  13. 03:5650 Meter Hold Unders
  14. 04:2375 Meter Shot
  15. 04:55100 Meter Aiming Point
  16. 05:20Impact Analysis
  17. 05:51Conclusion and Call to Action

Frequently Asked Questions

What is height over bore on a rifle?

Height over bore is the vertical distance between the center of your rifle's optic and the center of its barrel. This measurement is crucial because it affects where your bullet will impact relative to your point of aim, especially at close ranges.

How does height over bore affect aiming at close distances?

At very close distances, the difference between your optic's height and the barrel's height means that aiming directly at a target's head might cause the bullet to strike lower than intended. You often need to aim slightly above the target to compensate.

What is the purpose of zeroing a rifle for home defense?

Zeroing a rifle ensures your point of aim consistently matches your point of impact at a specific distance. For home defense, this means understanding how height over bore affects your accuracy at common indoor engagement ranges and practicing accordingly.

When should you use holdovers and hold unders?

You use holdovers (aiming higher) for distances shorter than your rifle's zero range, and hold unders (aiming lower) for distances beyond your zero range. This compensates for the bullet's trajectory and the effect of height over bore.

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