7.5x55 Swiss - Reloading Journal 1

Published on May 30, 2015
Duration: 40:03

This video details the initial steps of reloading for the 7.5x55 Swiss caliber, focusing on preparing Norma brass for use in K-31 and K11 rifles. The process includes resizing, trimming, priming, powder charging with IMR 4895, and bullet seating, highlighting potential challenges like stuck cases and the importance of verifying overall length for proper chambering in different firearms. The presenter emphasizes a 'learn together' approach, sharing his experience with new equipment and caliber.

Quick Summary

Reloading 7.5x55 Swiss for K-31 and K11 rifles presents challenges like varying chamber dimensions and die compatibility. Using IMR 4895 powder, a starting load of 40 grains is recommended for fire-forming. Proper setup of Lee dies, including significant cam-over, and careful adjustment of overall cartridge length are crucial for successful chambering.

Chapters

  1. 00:01Introduction to 7.5x55 Swiss Reloading
  2. 00:26Acquiring K-31 and K11 Rifles
  3. 00:59Reloading Challenges: Die Compatibility
  4. 01:35Brass Compatibility and Chamber Dimensions
  5. 02:03Starting the Reloading Journal
  6. 02:34Purchasing Brass: Norma and Lapua
  7. 03:09Seeking GP11 Ammunition for Brass Reference
  8. 03:36Planning First Loads: Fire Forming
  9. 04:33Experimenting with Brass Crossover
  10. 05:05Worst Case Scenarios for Reloading
  11. 05:27Redding and RCBS Dies for K-31
  12. 05:40Reloading Plan: Sizing and Testing
  13. 05:53Powder Selection: IMR 4895, H335, IMR 4064
  14. 06:33Die Setup Instructions
  15. 07:33Using the Redding T7 Turret Press
  16. 07:55Case Lubrication: Lanolin-Based Lubes
  17. 09:02Lubricating Inside Case Necks
  18. 10:21Disappointment with Norma Brass Packaging
  19. 10:53Deburring Flash Holes
  20. 11:15First Resizing Attempt: Stuck Case Issues
  21. 11:56Mistake: Pistol Die Habits Affecting Rifle Reloading
  22. 13:33Applying Extra Force During Resizing
  23. 15:29Reloading Issues and Tool Limitations
  24. 16:25Resizing Process Completion
  25. 16:51Shared Experience, Not Instructional Videos
  26. 17:15Resizing Success After Adjustments
  27. 17:25Reloading Manuals: Hornady and Lee
  28. 17:45Powder Choice: IMR 4895 Confirmed
  29. 18:08Trim Length Specifications
  30. 18:57Measuring Case Lengths
  31. 19:32Decision to Shoot Cases As-Is for Function Testing
  32. 19:55Purpose: Function Testing and Brass Compatibility
  33. 20:23Powder Choice Reconfirmed: IMR 4895
  34. 20:30Powder Data Discrepancies: Hornady vs. Lee
  35. 20:54Load Development: 40 Grains of IMR 4895
  36. 21:36Priming Cases
  37. 21:44Using a Hand Primer with Large Rifle Primers
  38. 23:34Primer Seating Experience
  39. 24:35Powder Measurement: Lee Scoop and Beam Scale
  40. 25:16Powder Charging Technique: Beam Scale and Trickler
  41. 25:56Bullet Selection: Hornady A-Max
  42. 26:43Setting Up the Bullet Seating Die
  43. 27:03Lee Die Set Components: Sizing, Seating, Factory Crimp
  44. 27:14Crimp Discussion: Avoiding Excessive Crimp on Quality Brass
  45. 27:39Setting Overall Length
  46. 27:52Bullet Seating Die Setup: Cam Over
  47. 29:15Overall Length Specifications: Hornady vs. Lee
  48. 29:56First Bullet Seating Attempt
  49. 32:22Chambering Test: K-31 Failure
  50. 33:35Chambering Test: K11 Success
  51. 34:12Understanding OAL Differences Between Rifles
  52. 35:01Adjusting OAL for Chambering
  53. 35:45Successful Chambering After Adjustment
  54. 36:05Final OAL Measurement: 2.942 inches
  55. 36:24Internet Research on OAL Variations
  56. 36:31Final OAL Achieved: ~29.45 inches
  57. 36:52Rifle Variability and OAL
  58. 37:35Purpose of Reloading: Function Testing and Play
  59. 37:42Magazine Loading
  60. 38:20Cycling Rounds Through K-31
  61. 39:01Cycling Rounds Through K11
  62. 39:47Conclusion and Future Outlook

Frequently Asked Questions

What are the main challenges when reloading 7.5x55 Swiss for K-31 and K11 rifles?

The primary challenges include potential differences in chamber dimensions between rifle variants, which can affect cartridge overall length (OAL) and chambering. Die compatibility can also be an issue, with some rifles requiring specific dies. Ensuring proper lubrication during resizing is crucial to prevent stuck cases.

What powder is recommended for initial 7.5x55 Swiss reloads, and what is a safe starting load?

IMR 4895 is a popular and effective powder for the 7.5x55 Swiss. A mild starting load of 40 grains with a 168-grain bullet is suggested for fire-forming cases and function testing, estimated to produce around 2400 fps.

How do you set up Lee Precision dies for rifle cartridges like the 7.5x55 Swiss?

Lee rifle dies typically require a significant cam-over. The resizing die should be screwed down until it touches the shell holder, then an additional quarter to a third turn more, with the lock ring tightened. The bullet seating die also requires a similar cam-over for proper function.

Why is overall cartridge length (OAL) critical when reloading for older firearms like the K-31 and K11?

OAL is critical because chamber dimensions can vary. A cartridge that chambers perfectly in one rifle might be too long for another, even in the same caliber. Adjusting OAL is often necessary to ensure reliable chambering and extraction, especially when fire-forming new brass.

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