Peterson Cartridge: How Brass is Made

Published on November 23, 2025
Duration: 23:41

This video details the comprehensive manufacturing process of brass rifle casings by Peterson Cartridge. It covers the transformation of raw brass cups through multiple drawing, annealing, washing, heading, trimming, and tapering stages. The process emphasizes precision, quality control through extensive automated and manual inspection, and specialized treatments like neck re-annealing and anti-tarnish coating to ensure match-grade performance.

Quick Summary

Peterson Cartridge manufactures brass rifle casings through a meticulous process involving drawing, annealing, washing, heading, extraction groove cutting, trimming, tapering, and polishing. Quality is ensured via 100% automated and manual inspection, measuring key features to within 1/10,000th of an inch, with a final 'easy seat' coating for optimal reloading performance.

Chapters

  1. 00:03Introduction: Brass Cups
  2. 00:20Production Area Overview
  3. 01:01WSM Caliber Cups
  4. 02:33First Draw Operation
  5. 03:34First Washer
  6. 03:47First Annealing Oven
  7. 04:05Second Washer
  8. 04:28Second Draw Operation
  9. 04:49Second Washer and Re-anneal
  10. 05:12Final Drawing Operation
  11. 05:47Post-Final Draw Wash
  12. 05:55Lubricant Application for Heading
  13. 06:12Heading Operation: Head Stamp & Primer Pocket
  14. 06:43Washing After Heading
  15. 06:50Extraction Groove Cutting
  16. 07:43Trimming Operation
  17. 07:57Tapering Operation
  18. 09:06Washing After Tapering
  19. 09:18Piercing & Trimming
  20. 09:52Tumbling and Polishing
  21. 10:33Media Separation
  22. 11:01Post-Tumbling Wash
  23. 11:27Mouth & Neck Re-annealing
  24. 12:10Anti-Tarnish & Easy Seat Coating
  25. 12:52Post-Re-anneal Storage
  26. 13:08Inspection Facility Introduction
  27. 14:49Automated Inspection Process
  28. 15:21Laser Grid Measurement
  29. 16:01Digital Human Eye Inspection
  30. 17:40Good Casings to Buckets
  31. 18:06Final Inspection & Packaging Prep
  32. 18:49Manual QC Inspection
  33. 20:11Packaging Process
  34. 21:11Warehousing and Distribution
  35. 21:42Web Sales Room
  36. 22:15Conclusion and Thanks

Frequently Asked Questions

What are the main stages in manufacturing a brass rifle casing?

The manufacturing process begins with brass cups, which are drawn, annealed, and washed multiple times. Key stages include heading for the primer pocket and head stamp, cutting the extraction groove, trimming, tapering, piercing a flash hole, and polishing. Final steps involve re-annealing the neck and applying an anti-tarnish coating before rigorous inspection and packaging.

How does Peterson Cartridge ensure the quality of its brass casings?

Peterson Cartridge employs a multi-stage quality control process. This includes extensive automated inspection using laser grids and cameras that measure dimensions to within 1/10,000th of an inch. Rejected parts are reviewed by human inspectors, and all accepted casings undergo final visual and dimensional checks before packaging.

What is the purpose of annealing in brass casing production?

Annealing is crucial because brass work hardens during the drawing process. Annealing softens the brass, making it malleable for further shaping without cracking. This process is repeated at various stages, particularly for the neck, to relieve stress and prevent 'season cracking' while ensuring proper neck tension.

What is the 'easy seat' coating applied to Peterson Cartridge casings?

The 'easy seat' coating is a slight lubricant and anti-tarnish treatment applied to the inside and outside of the casing. It helps ensure consistent and uniform seating of bullets and primers during reloading and also protects the casing's finish.

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