Bobs' 223 Bulk Bullets - VihtaVuori N133 and N135

Published on August 24, 2017
Duration: 21:47

This video details a reloading and accuracy testing session for 223 Remington using Bob's Bulk Bullets 55 grain FMJ projectiles. The instructor explores Vihtavuori N133 and N135 powders, testing various charge weights to achieve optimal accuracy. The session highlights the importance of careful powder measurement and the impact of different powders on group size and velocity.

Quick Summary

This reloading test for 223 Remington explored Vihtavuori N133 and N135 powders with Bob's Bulk Bullets 55 grain FMJ. Charge weights ranged from 22.5-24.5 grains for N133 and 23.5-25.5 grains for N135. Vihtavuori N135 showed slightly better accuracy, achieving a best group of 0.97 inches, with velocities around 3100 fps.

Chapters

  1. 00:00Introduction: 223 Bulk Bullets & Powder Testing
  2. 00:25Powder Selection: Vihtavuori N133 and N135
  3. 00:56Load Data and Development Strategy
  4. 01:43Primers and Brass Selection
  5. 02:07Addressing Online Criticism and Future Comparisons
  6. 03:29Upcoming Bullet Comparisons: Hornady and Lapua
  7. 03:32Future Project: MK 262 Mod 1 Clone
  8. 04:26Review of Previous Video: Lyman Jim 6
  9. 05:05Powder Charging Process with Lyman Jim 6
  10. 05:47Reloading Session Challenges and Setbacks
  11. 06:33Case Fill and Load Density with N135
  12. 07:45Overall Length and Case Fill Verification
  13. 08:42Range Setup: Target Distance and Equipment
  14. 09:23Testing Vihtavuori N133: 22.5 Grains
  15. 09:58Testing Vihtavuori N133: 23.0 Grains
  16. 10:35Testing Vihtavuori N133: 23.5 Grains
  17. 11:10Testing Vihtavuori N133: 24.0 Grains
  18. 11:42Testing Vihtavuori N133: 24.5 Grains (Max Charge)
  19. 12:25N133 Results and Transition to N135
  20. 13:02Testing Vihtavuori N135: 23.5 Grains
  21. 13:44Testing Vihtavuori N135: 24.0 Grains
  22. 14:08Testing Vihtavuori N135: 24.5 Grains
  23. 14:48Testing Vihtavuori N135: 25.0 Grains
  24. 15:14Testing Vihtavuori N135: 25.5 Grains (Max Charge)
  25. 15:45Bonus Group: 65 Grain Game Kings
  26. 16:46Barrel Heat and Bonus Group Performance
  27. 16:58Brass Inspection and Pressure Signs
  28. 17:10Accuracy Results: N133 vs. N135
  29. 17:53Overall Performance and Future Load Workup
  30. 18:14Bonus Group Analysis
  31. 19:03Channel Update: August Video Streak and Future Content
  32. 19:54Preview: Tomorrow's Video - N140 and Benchmark Powders
  33. 20:36Concluding Thoughts on Vihtavuori Powders
  34. 21:35Outro and Support

Frequently Asked Questions

What are the recommended charge weights for Vihtavuori N133 and N135 powders when reloading 223 Remington with 55 grain FMJ bullets?

For Vihtavuori N133, the tested range was 22.5 to 24.5 grains. For Vihtavuori N135, the tested range was 23.5 to 25.5 grains. These were tested in half-grain increments for accuracy.

Which Vihtavuori powder, N133 or N135, performed better for 223 Remington 55 grain FMJ bullets in this test?

Vihtavuori N135 generally showed slightly better accuracy potential, with the best group measuring around 0.97 inches. While N133 also produced acceptable results, N135 appeared to be the better performer in this specific test.

What were the key components used in this 223 Remington reloading test?

The test utilized Bob's Bulk Bullets 55 grain FMJ boattail projectiles, Vihtavuori N133 and N135 powders, Federal small rifle match primers, and prepped Lake City 5.56 brass. The firearm featured a White Oak Armament 18-inch barrel and a Vortex Viper PST scope.

What velocities were achieved with the tested 223 Remington loads?

Velocities for both Vihtavuori N133 and N135 loads reached approximately 3100 feet per second. The bonus group with 65 grain Game Kings achieved 3014 feet per second.

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