Barrel Harmonics Testing - Part 2

Published on August 5, 2018
Duration: 20:03

This video details Part 2 of a barrel harmonics testing series, focusing on the 6.5 Creedmoor caliber using a Thompson Center Compass. The instructor evaluates various muzzle devices and combinations, including the LimbSaver barrel resonator, to determine their impact on group size. Key findings suggest that adding the LimbSaver to already performing devices may not always improve accuracy and can sometimes degrade it. The Herald's Precision Tuner Brake shows promise with adjustable weights significantly affecting group performance.

Quick Summary

Testing indicates that adding a LimbSaver barrel resonator does not always improve accuracy and can sometimes degrade it when combined with well-performing muzzle devices. The Herald's Precision Tuner Brake offers significant tunability, with weight adjustments greatly impacting group size, while the VG6 Gamma 6.5 proved to be an excellent performer for the Thompson Center Compass.

Chapters

  1. 00:00Introduction & Recap
  2. 01:15Testing Plan: LimbSaver Combinations
  3. 03:03Bullet Type Discussion: Flat Base vs. Boat Tail
  4. 05:11Range Session: Camera Malfunction & Target Review
  5. 06:09Bare Barrel Baseline Group
  6. 06:39M11 Muzzle Device Test
  7. 07:11M11 + LimbSaver Combination Test
  8. 08:09Pro Comp 7-62 Test
  9. 08:55Pro Comp 7-62 + LimbSaver Combination Test
  10. 09:34Herald's Precision Tuner Brake Test (Adjustments)
  11. 11:12Herald's Tuner Brake + LimbSaver Combination Test
  12. 12:51Silencerco Muzzle Brake Test
  13. 13:26VG6 Gamma 6.5 Test
  14. 14:12VG6 Gamma 6.5 + LimbSaver Combination Test
  15. 14:48Final Group Analysis
  16. 15:01Herald's Tuner Brake Fitment Warning
  17. 16:47Key Takeaways: LimbSaver Impact & Device Performance
  18. 18:33Overall Conclusions & Future Testing
  19. 19:03Next Steps: Ammo Loading & 6.5 Grendel Testing

Frequently Asked Questions

Does adding a LimbSaver barrel resonator always improve firearm accuracy?

Based on this testing, adding a LimbSaver barrel resonator to a muzzle device that is already performing well did not consistently improve accuracy. In some cases, it actually increased group sizes, suggesting its effectiveness may be dependent on the specific combination of firearm and muzzle device.

How does the Herald's Precision Tuner Brake affect accuracy?

The Herald's Precision Tuner Brake showed significant tunability. Adjusting its weights from 150 to 100 drastically increased group size, while a setting of 50 produced a very good group. This indicates that proper tuning of the brake can substantially impact firearm accuracy.

Which muzzle device performed best on the Thompson Center Compass in 6.5 Creedmoor?

The VG6 Gamma 6.5 consistently performed very well, producing tight groups. The Silencerco flash hider from the previous video was also noted as a top performer, while the Silencerco muzzle brake was decent but not as accurate as the flash hider.

Are there any fitment issues to be aware of with the Herald's Precision Tuner Brake?

Yes, the Herald's Precision Tuner Brake has barrel diameter limitations. The tested 0.870-inch version will not fit barrels larger than that, such as a .875-inch barrel, which can lead to an inability to install the device.

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