Dillon 550B vs 550C: A Comprehensive Comparison for Reloading Enthusiasts

For reloading enthusiasts, the Dillon Precision name is synonymous with quality, reliability, and efficiency. Among their popular progressive reloading presses, the Dillon 550B and the Dillon 550C stand out as workhorses for high-volume reloading. Choosing between the Dillon 550B vs 550C can be tricky, as both offer exceptional performance. This comprehensive comparison will delve into the key differences, similarities, and considerations to help you determine which press best suits your needs.

Understanding the Dillon 550B

The Dillon 550B is a manually indexed progressive reloading press. This means that the operator manually rotates the shell plate to advance the cases through the various stages of the reloading process: resizing/decapping, priming, powder charging, bullet seating, and crimping. It’s known for its simplicity, durability, and affordability, making it a popular choice for both beginners and experienced reloaders. The Dillon 550B has been a mainstay in the reloading community for decades, proving its reliability time and time again.

Key Features of the Dillon 550B:

Manual Indexing: The operator manually rotates the shell plate.
Caliber Conversion: Relatively simple and affordable caliber changes.
Durable Construction: Built to last with high-quality materials.
Affordable Price Point: Generally more budget-friendly than the 550C.
Proven Reliability: A long-standing reputation for consistent performance.

Exploring the Dillon 550C

The Dillon 550C is the updated version of the 550B. While it retains the manual indexing feature, it incorporates several refinements and improvements designed to enhance the reloading experience. The Dillon 550C aims to address some minor shortcomings of its predecessor while maintaining the core principles of simplicity and reliability. Many users upgrading from the 550B find the 550C to be a worthwhile investment.

Key Features of the Dillon 550C:

Manual Indexing: Similar to the 550B, the operator manually rotates the shell plate.
Improved Priming System: Enhanced priming system designed for greater reliability and smoother operation.
Upgraded Powder Measure: Refinements to the powder measure to improve consistency and reduce powder spillage.
Enhanced Frame Design: Minor improvements to the frame for increased rigidity and stability.
Updated Primer Catcher: A redesigned primer catcher that is more effective at containing spent primers.

Dillon 550B vs 550C: Key Differences

While both presses share the core characteristic of manual indexing, the Dillon 550B vs 550C comparison reveals several important distinctions.

Priming System

This is perhaps the most significant difference. The 550C features a redesigned priming system that is generally considered to be more reliable and smoother than the 550B’s. The updated design aims to minimize priming issues, such as flipped primers or inconsistent primer seating depth. Many users have reported a noticeable improvement in priming consistency with the Dillon 550C.

Powder Measure

The 550C incorporates refinements to the powder measure to improve consistency and reduce powder spillage. While the basic design remains similar, subtle changes in the internal components and tolerances contribute to more accurate and repeatable powder charges. This can be particularly beneficial when reloading cartridges that are sensitive to powder charge variations. The Dillon 550C aims to provide a more consistent powder dispensing experience.

Frame Design

While not a drastic overhaul, the 550C features minor improvements to the frame design. These enhancements are intended to increase rigidity and stability, resulting in a more solid and stable reloading platform. This can contribute to smoother operation and reduced vibration, particularly during high-volume reloading sessions. The Dillon 550C’s frame improvements are subtle but contribute to an overall better feel.

Primer Catcher

The 550C features a redesigned primer catcher that is more effective at containing spent primers. This helps to keep the reloading area cleaner and reduces the mess associated with spent primers scattering around the press. While a seemingly minor detail, the improved primer catcher is a welcome addition for many reloaders. The Dillon 550C helps maintain a cleaner reloading environment.

Dillon 550B vs 550C: Similarities

Despite the differences, it’s important to acknowledge the similarities between the Dillon 550B vs 550C. Both presses share several key characteristics that contribute to their popularity and effectiveness.

Manual Indexing

Both presses are manually indexed, meaning the operator is responsible for rotating the shell plate. This provides a high degree of control over the reloading process and allows for visual inspection of each stage. While some reloaders prefer the automation of a progressive press with automatic indexing, manual indexing offers a more hands-on and deliberate approach. Both the Dillon 550B and Dillon 550C offer the manual indexing experience.

Caliber Conversion

Both presses offer relatively simple and affordable caliber conversions. By swapping out the shell plate, powder funnel, and possibly the primer feed parts, you can easily switch between different calibers. This versatility makes the 550B and 550C excellent choices for reloaders who work with a variety of cartridges. The Dillon 550B and Dillon 550C are both highly adaptable to different calibers.

Durable Construction

Both presses are built to last with high-quality materials and robust construction. Dillon Precision is known for its commitment to durability, and both the 550B and 550C are designed to withstand years of heavy use. This is a significant factor for reloaders who are looking for a long-term investment. The solid construction of the Dillon 550B and Dillon 550C ensures longevity.

Lifetime Warranty

Dillon Precision stands behind its products with a lifetime warranty. This provides peace of mind for reloaders, knowing that they are protected against manufacturing defects and premature wear. The lifetime warranty is a testament to Dillon’s confidence in the quality and durability of its presses. Both the Dillon 550B and Dillon 550C are backed by Dillon’s excellent warranty.

Choosing Between the Dillon 550B and 550C: Factors to Consider

Ultimately, the best choice between the Dillon 550B vs 550C depends on your individual needs, budget, and priorities.

Budget

The 550B is generally more affordable than the 550C. If budget is a primary concern, the 550B offers excellent value for its price. However, consider the long-term benefits of the 550C’s improvements if you can afford the additional cost. The Dillon 550B offers a lower initial investment.

Reloading Volume

Both presses are capable of high-volume reloading, but the 550C’s improved priming system and powder measure may offer a slight advantage in terms of consistency and efficiency. If you plan to reload large quantities of ammunition regularly, the 550C may be a worthwhile investment. The Dillon 550C can provide smoother operation during high-volume reloading.

Priming Sensitivity

If you are particularly sensitive to priming issues or reload cartridges that are prone to primer flipping, the 550C’s improved priming system is a significant advantage. The 550C is designed to minimize priming problems. The improved priming system of the Dillon 550C is a key selling point.

Experience Level

Both presses are suitable for both beginners and experienced reloaders. The 550B’s simplicity may be appealing to beginners, while the 550C’s refinements may be appreciated by experienced reloaders who are looking for incremental improvements. The Dillon 550B is a great entry point for new reloaders.

Final Verdict: Dillon 550B vs 550C

The Dillon 550B remains a solid and reliable choice for reloaders who are looking for an affordable and durable progressive press. Its proven track record and simple design make it an excellent value. However, the Dillon 550C offers several worthwhile improvements, particularly in the priming system and powder measure, that can enhance the reloading experience. If your budget allows, the 550C is generally considered to be the better option due to its refinements and improved performance. Ultimately, the decision between the Dillon 550B vs 550C depends on your individual needs and priorities. Consider what aspects of reloading are most important to you and choose the press that best aligns with your goals.

[See also: Dillon Precision Reloading Guide]

[See also: Progressive Reloading vs Single Stage Reloading]

[See also: Best Reloading Presses for Beginners]