DIY Determining Max Powder Charge

Published on April 26, 2011
Duration: 4:10

This video demonstrates a safe method for determining the maximum powder charge for handloaded ammunition by analyzing brass flow. Aaron Davidson of Gunwerks explains how to incrementally increase powder charges and inspect fired cases for ejector marks, indicating pressure. The optimal charge is found by identifying the first sign of pressure and reducing it slightly.

Quick Summary

Safely determine the max powder charge by incrementally increasing loads and inspecting fired brass for pressure signs like ejector marks. Start below manual max, use 0.5-grain increments, and back off 0.5 grains from the first sign of pressure.

Chapters

  1. 00:00Intro: Importance of Safe Max Powder Charge
  2. 00:50The Brass Flow Method Explained
  3. 01:33Test Setup: Incremental Loading
  4. 02:10Live Fire Testing with Savage Range System
  5. 02:51Analyzing Pressure Signs on Brass

Frequently Asked Questions

How can I safely determine the maximum powder charge for my handloads?

Safely determine the max powder charge by incrementally increasing loads and inspecting fired brass for pressure signs like ejector marks. Start below manual max, use 0.5-grain increments, and back off 0.5 grains from the first sign of pressure.

What are 'pressure signs' when reloading ammunition?

Pressure signs are indicators of excessive pressure in a firearm. Common signs include ejector marks ('smiley faces') on the case head, flattened primers, and difficulty extracting the spent case. These indicate you've reached or exceeded safe pressure limits.

What is the 'brass flow' method for checking reloading pressure?

The brass flow method involves examining the case head of fired brass. High pressure causes the brass to flow into the ejector cut on the bolt face, leaving a distinct mark. This mark's appearance and severity indicate the pressure level.

Why is it important to determine a custom max powder charge?

Published reloading data is based on specific test components. Your rifle's chamber, barrel, and chosen components may differ, requiring you to determine a safe maximum powder charge specific to your setup to avoid dangerous overpressure.

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