Is my Faxon barrel "whippy"? 6.5 Grendel

Published on December 11, 2017
Duration: 21:18

This video investigates the 'whippiness' of an 18-inch Faxon Match Series heavy fluted barrel in 6.5 Grendel by systematically testing point of impact shift and accuracy changes with various muzzle configurations. The presenter, an experienced shooter, details a methodical approach to isolate the effects of muzzle brakes, suppressors, and chronographs on barrel harmonics. The findings suggest that while the barrel is capable of excellent accuracy, its 'whippy' nature may present challenges during load development, with suppressors appearing to tighten groups.

Quick Summary

An 18-inch Faxon 6.5 Grendel barrel was tested for 'whippiness,' showing a significant downward point of impact shift (around 5 inches) when a suppressor was added. The suppressor also tended to tighten groups. This flexibility may present load development challenges, requiring careful identification of stable charge weight regions.

Chapters

  1. 00:00Introduction & Faxon Pronunciation
  2. 00:34The 18" Faxon Match Barrel in 6.5 Grendel
  3. 00:52Observed Point of Impact Shift
  4. 01:20Confusing Results with Different Ammunition
  5. 01:51Accuracy Changes with Suppressor
  6. 02:25Investigating the Situation Further
  7. 02:36Barrel Installation Checks
  8. 03:33Today's Test Scenarios
  9. 04:00Group 1: Naked Barrel
  10. 04:04Group 2: Muzzle Brake
  11. 04:09Group 3: Direct Thread Suppressor
  12. 04:19Group 4: Brake + Quick Change Adapter
  13. 04:33Group 5: Brake + Adapter + Chronograph
  14. 04:46Ammunition for the Test: 123gr Hornady A-Max
  15. 05:30Load Data: CFE 223
  16. 06:46Load Data: Reloader 15
  17. 07:11Test Plan: 25 Rounds, 5 Scenarios
  18. 09:31Results: CFE 223 - Ugly Groups
  19. 09:54CFE 223: Point of Impact Shift Analysis
  20. 11:14CFE 223: Group Size Improvement with Suppressor
  21. 11:36Results: Reloader 15 - More Acceptable Accuracy
  22. 13:01Reloader 15 vs CFE 223 Target Comparison
  23. 13:30Reloader 15: Upward Shift with Suppressed Groups
  24. 14:15Analysis: The 'Whippy' Barrel Theory
  25. 14:52Comparison to a Rigid Barrel (Brownells)
  26. 16:13Point of Impact Shifts with Different Bullets
  27. 16:35What's Going On: Better Bore, Whippy Barrel
  28. 17:13Load Development Challenges with Whippy Barrels
  29. 18:14Suppressor's Effect on Accuracy Re-evaluation
  30. 19:05Future Shooting Plan: Suppressor & Chronograph
  31. 19:31Video Purpose: Clarifying the Picture
  32. 19:41Potential Future Tests: Dampeners, Adjustable Brakes
  33. 20:18Experiences with Other Faxon Barrels
  34. 20:41Next Video Preview: Bullet Testing
  35. 21:01Channel Support & Affiliate Links

Frequently Asked Questions

What is a 'whippy' barrel in firearms?

A 'whippy' barrel in firearms refers to a barrel that is flexible and prone to significant flexing or vibration during the firing cycle. This flexibility can cause point of impact shifts and affect accuracy, especially when accessories like suppressors or chronographs are attached, or when different ammunition types are used.

How do suppressors affect point of impact on a Faxon 6.5 Grendel barrel?

On the tested 18-inch Faxon 6.5 Grendel barrel, adding a suppressor caused a noticeable downward point of impact shift, approximately 5 inches. The suppressor also appeared to tighten group sizes, suggesting it can stabilize the barrel's harmonics.

What are the recommended load development strategies for a 'whippy' barrel?

For a 'whippy' barrel, it's recommended to systematically test different muzzle configurations (naked, brake, suppressor) to understand their impact on point of impact and accuracy. Identifying 'forgiving regions' of charge weight where the barrel settles down is crucial for consistent performance.

What ammunition and powders were tested on the Faxon 6.5 Grendel barrel?

The test primarily used 123-grain Hornady A-Max bullets with CFE 223 and Alliant Reloader 15 powders. Results indicated that CFE 223 produced less accurate groups compared to Reloader 15, though the suppressor improved group sizes for both.

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