Loading 9mm +P with Speer Gold Dots - pt 3 - Accuracy Testing

Published on October 16, 2016
Duration: 39:22

This video details the process of reloading 9mm +P ammunition using Speer Gold Dot 124-grain bullets. It covers powder selection, charge weighing, bullet seating, and accuracy testing with three different powders: Alliant Power Pistol, Hodgdon HS6, and Accurate No. 7. The instructor emphasizes precise powder measurement and consistent bullet seating for optimal results.

Quick Summary

Reloading 9mm +P with Speer Gold Dot 124-grain bullets involves careful powder selection and measurement. Alliant Power Pistol at 6.5-6.6 grains achieved the target 1225 ft/s velocity. Accurate No. 7 was close, while HS6 fell short. Consistent bullet seating to 1.120-1.128 inches is crucial.

Chapters

  1. 00:05Introduction to 9mm +P Reloading Series
  2. 00:11Recap of Episodes 1 & 2: Powder Selection & Velocity Testing
  3. 01:14Today's Goal: Accuracy Testing Three Powders
  4. 01:42Speer Gold Dot 124gr Bullets
  5. 02:05Testing in Glock 19 vs. Glock 43
  6. 02:55Reloading Process: Brass Preparation
  7. 05:07Priming Cases
  8. 06:32Measuring Powder Charges: Power Pistol
  9. 07:33Power Pistol Charge Weights: 6.3 - 6.7 Grains
  10. 09:39Precision Powder Trickling
  11. 10:33First Five Charges Loaded
  12. 11:19Bullet Seating and Overall Length
  13. 12:45Factory Crimp Die Adjustment
  14. 13:30Loading Remaining Rounds
  15. 13:54Moving to 6.5 Grains of Power Pistol
  16. 14:38Seating Bullets on Last Rounds
  17. 14:55Accurate No. 7 Charge Weight Correction
  18. 15:45All Loads Ready for Testing
  19. 15:53Setting Up for Accuracy Testing
  20. 16:14Chronograph and Target Setup
  21. 16:45Using a Caldwell Pistol Rest
  22. 17:00Shooting Hornady Reloads for Warm-up
  23. 18:25Shooting Standard Pressure Factory Loads
  24. 19:10Target Distance: 12.5 Yards
  25. 19:33Shooting Plus P Factory Loads
  26. 20:15Factory Ammo Group Analysis
  27. 20:44Factory Ammo Velocity Comparison
  28. 21:24Shooting 6.3 Grains of Power Pistol
  29. 22:07Brass Condition and Velocity (Power Pistol)
  30. 22:17Front Sight Configuration Explanation
  31. 22:52Shooting 6.5 Grains of Power Pistol
  32. 23:09Camera Battery Issue and Resumption
  33. 24:07Shooting 6.7 Grains of Power Pistol
  34. 24:47Velocity and Group Analysis (Power Pistol)
  35. 25:02Moving to Hodgdon HS6: 6.5 Grains
  36. 25:24Shooter Error in HS6 Group
  37. 25:44Initial HS6 Velocity Observations
  38. 26:56Shooting 6.7 Grains of HS6
  39. 27:08Shooting 6.9 Grains of HS6
  40. 27:38HS6 Velocity Results and Disappointment
  41. 28:12Moving to Accurate No. 7: 8.2 Grains
  42. 28:46Shooting 8.3 Grains of Accurate No. 7
  43. 29:18Shooting 8.5 Grains of Accurate No. 7
  44. 30:03Accurate No. 7 Velocity Results
  45. 30:13Praise for Chronograph App
  46. 30:43Packing Up and Data Review
  47. 31:06Productive Range Trip Summary
  48. 31:16Power Pistol Data Analysis
  49. 31:58Recommended Power Pistol Load
  50. 32:08HS6 Data Analysis and Shortcomings
  51. 33:02Estimated HS6 Load for Target Velocity
  52. 33:29Accurate No. 7 Data Analysis
  53. 33:53Recommended Accurate No. 7 Load
  54. 34:02Standard Deviation Analysis
  55. 34:46Accuracy Group Analysis
  56. 35:00Shooter Skill vs. Powder Accuracy
  57. 36:16Conclusion on Accuracy
  58. 36:40Glock Barrel Performance
  59. 37:15Future Reloading Plans
  60. 37:24Plans for Episode 4: Further Testing
  61. 37:38Initial Goal Achieved
  62. 37:51Episode 4: Velocity Test in Glock 43
  63. 38:48Testing in a Beta with Longer Barrel
  64. 39:06Concluding Remarks

Frequently Asked Questions

What are the recommended charge weights for 9mm +P reloads using Speer Gold Dot 124-grain bullets?

For Speer Gold Dot 124-grain 9mm +P reloads, tested charge weights included 6.3-6.7 grains of Alliant Power Pistol, 6.5-6.9 grains of Hodgdon HS6, and 8.2-8.5 grains of Accurate No. 7. The optimal load for Power Pistol was found to be around 6.5-6.6 grains for a target velocity of 1225 ft/s.

Which powders performed best for 9mm +P reloading in terms of velocity?

Alliant Power Pistol performed well, achieving target velocities with charge weights between 6.3 and 6.7 grains. Accurate No. 7 also came close, with 8.5 grains averaging 1215 ft/s. Hodgdon HS6 loads tested did not reach the desired 1225 ft/s velocity.

How did factory standard pressure and +P 9mm ammunition compare in velocity testing?

Surprisingly, both standard pressure and +P factory 9mm loads averaged the same velocity of 1200 ft/s. However, the +P loads exhibited a much higher standard deviation (36.8) compared to the standard pressure loads (16.6).

What is the recommended overall length for 9mm +P reloads with Speer Gold Dot bullets?

The recommended overall length for 9mm +P reloads with Speer Gold Dot 124-grain bullets is approximately 1.120 to 1.128 inches. Minor variations are acceptable, but it's crucial to avoid seating too short.

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