RCBS Rock Chucker Supreme Auto Prime Review

Testing the RCBS Rock Chucker Supreme Auto Prime: What You Need to Know

For anyone who has spent a significant amount of time at the reloading bench, efficiency and safety when handling primers are paramount concerns. This is precisely where the RCBS Rock Chucker Supreme Auto Prime system enters the picture, aiming to streamline the often tedious process of single-stage priming. My own journey to this particular auto-priming unit began with a desire to reduce the minuscule, yet cumulative, time spent picking up individual primers and the inherent risk of accidental discharge associated with manual handling. After countless hours spent loading various calibers, from .45 ACP to .300 WBY Magnum, the need for a more integrated priming solution became increasingly apparent.

Initial impressions upon unboxing revealed a robust, albeit utilitarian, piece of equipment. It feels like a true workhorse, designed for functionality rather than aesthetics, which aligns perfectly with my expectations for RCBS products. I briefly considered a few other bench-mounted priming tools, but the direct integration with my existing Rock Chucker press was a significant draw. My first reaction was one of professional curiosity mixed with a touch of cautious optimism – would this unit truly deliver on its promise of enhanced speed and safety?

Real-World Testing: Putting RCBS Rock Chucker Supreme Auto Prime to the Test

First Use Experience

My initial testing of the RCBS Rock Chucker Supreme Auto Prime took place on my primary reloading bench, a space well-acquainted with the clatter of brass and the distinct scent of gunpowder. I began by loading a batch of .45 ACP cases, a caliber I’ve worked with extensively. The unit attaches directly to the priming arm slot on the Rock Chucker press, a straightforward swap from the standard priming equipment. Once properly set up with the correct primer cup, seat plug, and the included safety shield, the process of loading primers into the tube felt novel.

There was definitely a learning curve involved; it took a few hundred rounds to truly develop a feel for the stroke and ensure consistent primer seating without excessive force. The straight push-pull of the primer arm slide is a departure from the subtle toggle of manual priming arms, and it initially felt a bit abrupt. However, after this initial adjustment period, I found the primer feed to be remarkably reliable, and the elimination of individual primer handling provided a palpable sense of security. The RCBS Rock Chucker Supreme Auto Prime proved itself adept at handling both large and small primers without complaint, a critical factor for a versatile reloader.

Extended Use & Reliability

Over several months and several thousand rounds loaded across a diverse range of cartridges, the RCBS Rock Chucker Supreme Auto Prime has become an indispensable part of my reloading setup. It has consistently performed its core function without any degradation in performance. I haven’t observed any significant wear or tear, beyond the expected minor scuffs from regular use. The plastic components of the primer tubes have held up well, showing no signs of becoming brittle or cracking.

Maintenance is refreshingly simple; a quick wipe-down with a dry cloth and occasional compressed air to clear any primer dust is all that’s typically required. Compared to my previous experience with individual primer trays and hand priming tools, this auto-prime system significantly reduces the chances of dropping primers, a common annoyance that can lead to wasted time and potential safety hazards. It certainly surpasses the speed and convenience of older, less integrated priming systems I’ve encountered.

Breaking Down the Features of RCBS Rock Chucker Supreme Auto Prime

Specifications

The RCBS Rock Chucker Supreme Auto Prime unit is designed to convert your existing Rock Chucker press’s one-at-a-time priming system into a more efficient tube-fed operation. It attaches directly to the same point as the standard priming arm, making the transition seamless for RCBS press owners. The system includes the necessary primer pick-up tubes, primer seat plugs for both large and small primers, and a crucial safety shield.

A key specification is its 100-primer capacity in the feed tube, which dramatically reduces the frequency of refilling compared to picking up primers one by one. The push bar operation ensures a straightforward mechanical action with each press stroke. The fact that it is manufactured in the USA speaks to a certain standard of build quality and material sourcing that I have come to expect from RCBS.

Performance & Functionality

The primary function of the RCBS Rock Chucker Supreme Auto Prime is to automate the primer seating process during single-stage reloading, and it excels at this. By feeding primers directly into the seating plug via a tube, it virtually eliminates the need to handle individual primers, thereby increasing safety and speed. The straitened push-pull motion of the priming slide contributes to a more stable primer seating process, minimizing the risk of tipping or misaligning the primer.

While it significantly speeds up the priming step, it’s important to note that it doesn’t eliminate the manual operation of the press stroke itself. However, the time saved by not having to retrieve and place individual primers is substantial, especially during longer reloading sessions. The critical test is how well it seats primers, and in this regard, it performs admirably. Each primer is seated firmly and consistently, which is essential for consistent ignition and reliable ignition.

Design & Ergonomics

The design of the RCBS Rock Chucker Supreme Auto Prime is purely functional, reflecting its purpose as a tool to enhance the efficiency of an already established reloading press. The materials used feel durable, with a solid metal base that attaches to the press and sturdy plastic for the primer tubes and safety shield. The push bar operation is designed for a positive engagement with each press cycle.

Ergonomically, the unit integrates well with the Rock Chucker press’s existing lever action. The learning curve, as mentioned, involves getting accustomed to the feel of the push-pull slide versus a more traditional priming arm motion. Once mastered, it becomes second nature, and the inclusion of the safety shield offers an excellent visual and physical barrier against accidental primer ignition.

Durability & Maintenance

Based on my extensive use, the RCBS Rock Chucker Supreme Auto Prime appears to be built for long-term durability. The metal components are well-finished and show no signs of rust or significant wear. The plastic primer tubes, while less robust than metal, have proven surprisingly resilient. They are designed to be replaceable should one ever become damaged.

Maintenance is refreshingly simple, primarily involving keeping the primer tube and the internal mechanism free of primer residue. A quick blast of compressed air after a reloading session is usually sufficient. The USA manufacturing origin often correlates with a higher standard of material quality and assembly, which seems to hold true for this auto-priming unit.

Accessories and Customization Options

The RCBS Rock Chucker Supreme Auto Prime comes with a comprehensive package that includes everything needed to get started. This includes the primer pick-up tubes for both large and small primers, and corresponding primer seat plugs. The safety shield is also a vital component included in the package.

While there aren’t extensive customization options for the auto-prime unit itself, RCBS offers a range of spare parts, such as additional primer tubes, should they ever be needed. The true “customization” comes from the ability to use this unit with different calibers simply by swapping out the appropriate shell holder and powder measure on the press, and ensuring you have the correct primer size seated.

Pros and Cons of RCBS Rock Chucker Supreme Auto Prime

Who Should Buy RCBS Rock Chucker Supreme Auto Prime?

The RCBS Rock Chucker Supreme Auto Prime is an excellent investment for any reloader who owns an RCBS Rock Chucker press and is looking to increase the efficiency and safety of their priming process. It’s particularly well-suited for those who load moderate to high volumes of ammunition and find themselves performing the priming step repeatedly. If you’ve ever experienced the frustration of fumbling with individual primers or worrying about dropping one, this unit will bring you considerable peace of mind.

However, individuals who primarily reload only a handful of rounds infrequently, or those who do not own a compatible RCBS press, might find this specific auto-priming unit less necessary. For these users, a high-quality hand primer might suffice. If you’re investing in this unit, I highly recommend also ensuring you have a clean and well-organized primer supply system, such as the RCBS Primer Tray, to maximize the efficiency gains when filling the primer feed tubes.

Conclusion on RCBS Rock Chucker Supreme Auto Prime

The RCBS Rock Chucker Supreme Auto Prime is a thoughtfully designed accessory that genuinely enhances the reloading experience. It addresses the inherent risks and inefficiencies of manual primer handling, offering a more streamlined and safer method for bench-rest reloaders. While there’s a brief adjustment period, the payoff in terms of speed and confidence is well worth it. For its price point of $71.79, the increase in safety and efficiency it provides makes it a solid value proposition for any RCBS Rock Chucker owner. I wholeheartedly recommend this unit to fellow reloaders looking to refine their process and add a critical layer of safety to their bench.