300 Blk - Trying Cream of Wheat and Cotton as case fillers - ep 35

Published on September 5, 2016
Duration: 38:01

This video details an experiment to address powder position sensitivity in 300 Blackout subsonic loads using Cream of Wheat and cotton as case fillers. The instructor tests various amounts of Cream of Wheat and packed cotton, documenting the significant fouling and cycling issues encountered with both materials. The experiment concludes that neither Cream of Wheat nor cotton are viable case fillers for reliable firearm function, leading to a recommendation for heavier bullets for subsonic applications.

Quick Summary

Experiments with Cream of Wheat and cotton as case fillers for 300 Blackout subsonics failed due to severe firearm fouling. Both materials created gritty residue and burnt debris, causing malfunctions like failures to feed, eject, and go into battery, leading the instructor to recommend heavier bullets for reliable performance.

Chapters

  1. 00:01Introduction: Powder Position Issue
  2. 00:50Polyfill Test Recap & Failure
  3. 01:53Introducing Cream of Wheat as Filler
  4. 02:33Introducing Cotton as Filler
  5. 03:07Loading with Cream of Wheat (Dippers)
  6. 04:00Cream of Wheat Volume Testing (0.3cc, 0.5cc, 0.7cc)
  7. 06:41Assessing Cream of Wheat Fill Levels
  8. 07:35Planning Cream of Wheat Test Rounds (10 of each volume)
  9. 08:21Seating Bullets for Cream of Wheat Test
  10. 09:56Finalizing Overall Length
  11. 11:06Initial Impressions of Cream of Wheat Fill
  12. 12:04Testing 0.5cc Cream of Wheat Compression
  13. 13:16Adjusting Cream of Wheat Volumes for Test (0.3cc, 0.5cc, 0.6cc)
  14. 14:25Loading 0.3cc Cream of Wheat Rounds
  15. 15:30Loading Cotton Rounds
  16. 16:02Preparing Cotton Strips
  17. 17:17Assessing Cotton Fill Level
  18. 18:04Final Cotton Fill Assessment
  19. 19:51Range Prep & Initial Thoughts
  20. 20:12Range Testing Begins: Cream of Wheat (0.5cc)
  21. 21:33First Cream of Wheat Shot (0.5cc)
  22. 22:02Cream of Wheat Malfunction & Fouling
  23. 23:52Cleaning Firearm After Cream of Wheat Test
  24. 24:05Testing Cream of Wheat (0.3cc)
  25. 25:39Cream of Wheat (0.3cc) Malfunctions & Fouling
  26. 27:13Extreme Firearm Fouling from Cream of Wheat
  27. 29:51Testing Cotton Rounds
  28. 30:02Cotton Rounds Firing & Malfunctions
  29. 31:05Burning Cotton Smell & Fouling
  30. 32:07Severe Cotton Fouling on Bolt
  31. 33:34Firearm Condition After Cotton Test
  32. 34:54Conclusion: Filler Experiments End
  33. 35:52Rethinking Light Subsonic Loads
  34. 36:32Future Bullet Weight Considerations
  35. 37:25Focus on Cast Bullets for Subsonics
  36. 37:54Thanks for Watching

Frequently Asked Questions

What were the main issues encountered when using Cream of Wheat as a case filler in 300 Blackout loads?

Using Cream of Wheat as a case filler in 300 Blackout loads resulted in severe firearm fouling. The material turned into a gritty, sand-like substance that heavily coated the bolt, bolt carrier group, and gas tube, leading to malfunctions like failures to feed, eject, and go into battery.

Did cotton pads prove to be a viable case filler for 300 Blackout subsonics?

No, cotton pads were not a viable case filler. While initially seeming like a good idea, they produced significant fouling with burnt cotton accumulating on critical firearm components, preventing proper extraction and cycling, and ultimately leading to malfunctions.

What was the primary problem the instructor was trying to solve with case fillers in 300 Blackout loads?

The instructor was trying to solve powder position sensitivity in light 300 Blackout subsonic loads. With light bullets and insufficient powder, the orientation of the powder in the case significantly affected velocity, and fillers were intended to keep the powder consistently positioned.

What is the instructor's final recommendation for reliable 300 Blackout subsonic ammunition?

Based on the failed filler experiments, the instructor recommends using heavier bullets for reliable 300 Blackout subsonic performance, as they are less susceptible to powder position issues. The experiments with Cream of Wheat and cotton were deemed failures due to extreme fouling and malfunctions.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from Johnny's Reloading Bench

View all →