How To Use the Hornady OAL Gauge To Load More Consistent Ammo

Published on March 2, 2020
Duration: 4:16

This guide details how to use the Hornady OAL Gauge and Bullet Comparator to achieve precise bullet seating depths for improved ammunition accuracy. The process involves measuring the distance to the rifling lands and then setting the bullet seating die to achieve a desired distance off the lands, typically between 0.020" and 0.040". This technique is crucial for handloaders seeking to maximize consistency and accuracy in their reloaded ammunition.

Quick Summary

The Hornady OAL Gauge helps handloaders measure the distance to the rifling lands. Combined with a Bullet Comparator, it allows precise setting of bullet seating depth, typically 0.020" to 0.040" off the lands, for maximum ammunition accuracy and consistency.

Chapters

  1. 00:00Introduction to Accuracy & OAL Gauge
  2. 00:11Setting up the OAL Gauge
  3. 00:42Measuring the Chamber and Lands
  4. 01:30Using the Bullet Comparator
  5. 02:07Determining Optimal Seating Depth
  6. 03:12Curved Gauge for Different Actions

Frequently Asked Questions

What is the purpose of the Hornady OAL Gauge?

The Hornady OAL Gauge is a specialized tool for handloaders that allows precise measurement of the distance between the bullet's ogive and the rifle's rifling lands, crucial for optimizing ammunition accuracy and consistency.

How do you use the Hornady Bullet Comparator?

The Bullet Comparator attaches to calipers and, with a caliber-specific insert, measures from the bullet's ogive to the case head. This provides a consistent reference point for setting bullet seating depth when reloading.

What is the recommended seating depth off the lands for accuracy?

Hornady generally recommends starting with bullet seating depths between 0.020 inches and 0.040 inches off the rifling lands. This range often provides a good balance between accuracy and safe chamber pressures.

Why is measuring from the bullet ogive important?

Measuring from the bullet ogive, rather than the tip, ensures consistent and accurate seating depth readings. Bullet tips can vary in shape and length, making them an unreliable reference point for precision reloading.

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