6.5x55 Swedish Reamer: A Precision Guide for Reloaders
The 6.5x55 Swedish Mauser cartridge, a classic known for its accuracy and versatility, often requires precise reaming for optimal performance. Finding the right reamer, especially one that avoids overly aggressive cuts ("not too deep a jump"), is crucial for achieving consistent results and preserving your brass. This guide explores the nuances of selecting a 6.5x55 Swedish reamer and ensures you understand the implications of different chamber dimensions.
Understanding Reamer Types and Chamber Specifications:
Before diving into the specifics of a "not too deep a jump" reamer, it's vital to grasp the importance of chamber specifications. The 6.5x55 Swedish chamber isn't universally standardized; variations exist between manufacturers and even within the same manufacturer's production runs. This means a "one-size-fits-all" approach rarely yields optimal results.
There are several types of reamers available, each designed for a specific purpose:
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Standard SAAMI Reamer: This reamer follows the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) specifications. It represents a relatively common chamber dimension, but may not perfectly match your specific rifle's chamber.
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"No-Turn" Neck Reamer: This type only reams the neck of the case, useful for improving case neck tension and consistency. It doesn't alter the overall chamber dimensions.
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Custom Reamer: This option allows for precise customization based on your rifle's chamber dimensions. A gunsmith typically measures your chamber and creates a reamer to match, offering the best possible fit.
What Does "Not Too Deep a Jump" Mean?
The phrase "not too deep a jump" refers to the shoulder angle and shoulder position of the reamer. A "deep jump" reamer significantly alters the shoulder angle and moves the shoulder further into the case, potentially creating problems. These problems can include:
- Overly Tight Chambers: A deep jump might create a chamber too tight for easy loading and unloading, potentially causing damage to brass.
- Excessive Pressure: A tighter chamber increases pressure within the cartridge, potentially leading to dangerous situations.
- Inconsistent Accuracy: A mismatch between the reamer and the rifle's chamber negatively affects the cartridge's seating depth and bullet alignment, resulting in inconsistent accuracy.
How to Choose the Right Reamer:
Selecting the correct reamer requires a thoughtful approach. Ideally, you should:
- Measure Your Rifle's Chamber: Having your rifle's chamber professionally measured by a gunsmith is the gold standard. This provides precise data for designing a custom reamer.
- Consult with an Experienced Reloader: Seek advice from experienced reloaders familiar with the 6.5x55 Swedish cartridge and its chamber variations.
- Start with a SAAMI Spec Reamer (with Caution): If professional measurement isn't an option, a SAAMI spec reamer can be a starting point, but understand that it may not be a perfect fit.
Frequently Asked Questions (PAA):
Q: What are the consequences of using the wrong 6.5x55 Swedish reamer?
A: Using an incorrectly sized reamer can lead to high pressure, increased risk of chambering issues, poor accuracy, case damage, and even potential danger. Always use caution and strive for a precise fit between reamer and chamber.
Q: Can I ream my 6.5x55 Swedish chamber myself?
A: While possible, reaming your chamber requires specific tools and expertise. Mistakes can damage your rifle beyond repair. It's strongly recommended to have a qualified gunsmith perform this task.
Q: How often should I ream my 6.5x55 Swedish cases?
A: The frequency of case reaming depends on the number of firings and the condition of your cases. Regular inspection for neck thinning and other signs of wear is necessary. A neck sizing die will typically handle most instances; full-length resizing should be less frequent.
Q: What's the difference between a full-length and neck sizing die?
A: A full-length sizing die resizes the entire cartridge case, including the body and shoulder. A neck sizing die only resizes the neck, preserving the body's dimensions and reducing case wear. The latter is generally preferred to preserve brass life and avoid over-working the case.
Conclusion:
Choosing the right 6.5x55 Swedish reamer, specifically one that avoids "too deep a jump," is crucial for the success and safety of your reloading efforts. Prioritizing precision and seeking expert advice will ensure the longevity of your rifle and the accuracy of your ammunition. Remember that safety and accuracy should always be your top priorities when reloading. Consult with a qualified gunsmith or experienced reloader if you are unsure about any aspect of the process.
