Lee Micrometer Adjust Screw

Published on February 27, 2025
Duration: 51:37

This video demonstrates the installation and initial use of the Lee Rifle Micrometer Adjust Screw for Lee bullet seating dies. The presenter highlights its ease of use, affordability, and improved precision for handloaders. The video also includes extensive range testing of various .223 Remington loads, comparing different brass types and bullet weights, with detailed performance data.

Quick Summary

The Lee Rifle Micrometer Adjust Screw offers precise, repeatable adjustments for bullet seating depth, enhancing ammunition consistency. It features durable, easy-to-read laser etching and is an affordable upgrade for Lee bullet seating dies, typically costing between $15-$20.

Chapters

  1. 00:01Introduction & Lee Micrometer Adjust Screw
  2. 00:38Reloading .223 Remington: Brass & Load Data
  3. 01:16Load Data: 77gr Sierra/Berger, 40gr Nosler
  4. 02:43Brass Testing: Lake City vs. Mixed Headstamps
  5. 05:23Lee Micrometer Adjust Screw: First Impressions
  6. 07:03Micrometer Adjust Screw Types (Rifle, Pistol, Large Cal)
  7. 08:06Installing the Micrometer Adjust Screw
  8. 09:32Lee Micrometer Adjust Screw: Price & Fit
  9. 11:09Reloading Process: Setting Up the Die
  10. 13:33Seating 77gr Sierra Match King Bullets
  11. 14:38Measuring Bullet Seating Consistency
  12. 16:11Seating with Mixed Brass (Lake City & Other Brands)
  13. 17:50Seating 77gr Berger OTM Tactical Bullets
  14. 20:15Seating 40gr Nosler Ballistic Tip Varmint Bullets
  15. 23:59Micrometer Adjust Screw: System for Reuse
  16. 24:38Range Test: 77gr Sierra Match King (Lake City Brass)
  17. 27:33Range Test: Mixed-Year Lake City Brass Group
  18. 32:05Range Test: Mixed Brand Brass Group
  19. 35:50Range Test: 77gr Berger OTM Tactical
  20. 39:14Range Test: 40gr Nosler Ballistic Tip Varmint
  21. 41:56Post-Range Analysis: Brass Condition & Pressure Signs
  22. 43:53Varget N540 Pressure Concerns
  23. 48:46Mean Radius Group Analysis
  24. 49:57Overall Results & Confidence
  25. 50:40Conclusion: Lee Micrometer Adjust Screw Review

Frequently Asked Questions

What is the main benefit of the Lee Rifle Micrometer Adjust Screw?

The Lee Rifle Micrometer Adjust Screw provides precise, repeatable adjustments for bullet seating depth, allowing handloaders to fine-tune their ammunition for improved accuracy and consistency. It offers approximately 50,000ths of an inch adjustment per turn and is an affordable upgrade.

How does the Lee micrometer adjust screw compare to older designs?

The Lee micrometer adjust screw features durable laser etching with excellent contrast, making it easier to read than some older designs that could be difficult to see at certain angles. It also offers smooth operation and a good finish.

Can mixed headstamp brass be used for accurate reloading?

Yes, surprisingly, mixed headstamp brass can yield consistent groups and velocities. In testing, a group with 17 different brands of brass performed exceptionally well, even achieving the best mean radius of the day, challenging the notion that only matched brass is suitable for accuracy.

What were the key load data points tested in the video?

The video tested 77-grain Sierra Match King and Berger OTM Tactical bullets with 24.5 grains of Varget N540, and 40-grain Nosler Ballistic Tip Varmint bullets with 23.0 grains of Alliant Reloder 7. All were seated to 2.26 inches overall length.

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