How to Make Super Accurate Ammo ~ Part IV Neck Turning

Published on February 18, 2023
Duration: 27:08

This video details the process of neck turning brass cases to achieve superior ammunition accuracy. The instructor explains the hierarchy of accuracy factors, emphasizing powder and charge weight as paramount, followed by bullet quality. He then focuses on case neck concentricity, explaining how runout affects bullet alignment and accuracy. The guide demonstrates converting a case trimmer into a neck turner using specialized pilots and cutters, highlighting the importance of lubrication and precise adjustments to remove high spots and ensure a perfectly concentric neck for optimal bullet seating and flight.

Quick Summary

For super accurate ammunition, the most critical factors are powder selection and charge weight, followed by bullet quality. Achieving perfect case neck concentricity through processes like neck turning is also vital, as it ensures the bullet enters the bore aligned, minimizing flight deviations and maximizing accuracy.

Chapters

  1. 00:00Introduction to Super Accurate Ammo
  2. 00:46Hierarchy of Accuracy Factors
  3. 01:42Importance of Powder and Charge
  4. 01:46Bullet Quality vs. Modern Standards
  5. 02:43The Minutiae of Accuracy
  6. 03:15Concentricity and Case Runout
  7. 04:20Brass Quality and Runout
  8. 04:50Achieving Concentricity with Neck Turning
  9. 05:00Addressing Competitor Claims on Neck Turning
  10. 06:08Dealing with Distorted Brass
  11. 06:35Impact of Neck Runout on Accuracy
  12. 07:08Fireforming vs. Non-Fireformed Cases
  13. 08:07Bolt Action Influence on Case Position
  14. 10:15The Goal: Concentricity within the Chamber
  15. 11:00Cumulative Accuracy Gains
  16. 11:45Testing Starline Cases for Uniformity
  17. 12:50Understanding Thousandths of an Inch
  18. 13:28Converting to a Neck Turner
  19. 13:42Steps for Conversion
  20. 14:12Replacing the Trimming Pilot
  21. 14:40Setting Up the Depth Control
  22. 15:35Installing the Cam Mechanism
  23. 16:31The Carbide Cutter
  24. 17:30Mounting the Cutter
  25. 18:57Imperative Lubrication
  26. 19:14Applying Lubricant
  27. 20:34Positioning the Case
  28. 21:15Running the Cutter
  29. 21:30Using the Cam to Back Off
  30. 22:14Visualizing the Cut
  31. 23:41Systematic Neck Turning Process
  32. 24:26Achieving Near-Perfect Concentricity
  33. 24:57Is Neck Turning Worth It?
  34. 25:46The Pursuit of Utmost Inaccuracy
  35. 26:24Transition to Loading
  36. 26:36Patreon Support and Subscription Call

Frequently Asked Questions

What is the most important factor for achieving accurate ammunition?

According to expert firearm instructors, the most critical factors for ammunition accuracy are the specific powder used and the precise charge weight for the rifle. These elements significantly outweigh other considerations like bullet quality or case preparation in determining overall accuracy.

How does case neck concentricity affect bullet accuracy?

Case neck concentricity is vital for high accuracy. If a case neck has runout, it can misalign the bullet as it's seated, causing it to enter the bore off-center. This uneven engagement with the rifling before it strikes the opposite side can lead to significant deviations in bullet flight and group size.

What is neck turning, and why is it done for reloading?

Neck turning is a gunsmithing process that shaves excess brass from the outside of a cartridge case's neck. It's performed to ensure the neck is perfectly concentric, eliminating runout. This precise alignment is crucial for consistent bullet seating and optimal aerodynamic performance, leading to improved accuracy.

What tools are needed to perform neck turning on brass cases?

To perform neck turning, you'll need a specialized tool like the Forester Neck Turner, which can be converted from a case trimmer. Key components include a neck turning pilot (sized to the bullet diameter), a carbide cutter, and a mechanism to control the depth and movement of the cutter along the case neck.

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