RCBS Lock-Out Reloading Dies Review

My Verdict on the RCBS Lock-Out Reloading Dies

After over a decade of pushing the limits of gear in diverse environments, from dusty workshops to sterile labs and rugged outdoor expeditions, I’ve learned to appreciate the tools that offer genuine safety and reliability. The RCBS Lock-Out Reloading Dies are precisely that kind of tool. This unique die is designed to prevent catastrophic reloading errors, specifically a “no powder” or “double charge” scenario, which can lead to dangerous squib loads or over-pressure events. My own reloading journey, unfortunately, includes a near-miss with a squib load that lodged a projectile deep in the barrel of my .40 S&W pistol, a stark reminder that even experienced hands can falter. This incident, and the subsequent realization of how easily distraction can lead to error on a progressive press, compelled me to seek out a foolproof safety net. When I first laid hands on the RCBS Lock-Out Die, its solid steel construction and straightforward design immediately conveyed a sense of robust dependability. While I briefly considered other powder-checking mechanisms, their reliance on visual cues or audible alerts seemed less failsafe than this mechanical interlock. My initial impression was one of profound relief, a tangible sense of enhanced security for every subsequent reloading session.

Real-World Testing: Putting RCBS Lock-Out Reloading Dies to the Test

First Use Experience

I first integrated this powder-checking die into my progressive press setup at my dedicated reloading bench, a controlled environment where I could meticulously observe its function. The primary test involved intentionally simulating both a “no powder” condition and a “double charge” scenario by manually disabling the powder drop or intentionally over-filling a case. Each time, the ram on my progressive press physically locked up precisely at the point where the die should have seated the projectile, a clear and undeniable physical halt. This immediate, tactile feedback was far more reassuring than any audible beep or visual indicator could ever be. There was no guesswork involved; the press simply would not proceed, forcing me to address the faulty case directly.

This die performed identically whether I was loading 9mm or .40 S&W cases, demonstrating consistent functionality across different straight-wall pistol calibers. The setup process itself was remarkably intuitive, requiring only a few minutes to adjust the die’s seating depth to correctly engage with improperly charged cases. My only surprise was how utterly simple yet profoundly effective the mechanism is. It’s a testament to good engineering when a complex problem is solved with elegantly simple mechanics.

Extended Use & Reliability

Over the past year, this specific die has become an indispensable part of my reloading process for pistol ammunition, now accumulating hundreds, if not thousands, of rounds through my press. It has reliably caught multiple instances of accidental powder spills and a couple of “short stroke” events that would have otherwise resulted in an under-charged case. More importantly, it has prevented any potential double charges from progressing, which is the most critical safety function.

Despite being subjected to the occasional tremor from nearby workshop activity and the constant cycle of press operation, the steel construction shows absolutely no signs of wear or degradation. The internal mechanism remains smooth and precise, with no stiffness or binding. Cleaning is as simple as wiping down the exterior and ensuring no debris accumulates in the die’s threads or within the mechanism itself. Given its robust build, I anticipate many more years of reliable service from this reloading component. It far surpasses any past experience with less sophisticated powder check systems, which often relied on the operator’s diligence rather than mechanical enforcement.

Breaking Down the Features of RCBS Lock-Out Reloading Dies

Specifications

The RCBS Lock-Out Reloading Dies are designed for a specific purpose: to mechanically prevent dangerous powder charges in progressive reloading. They are constructed from durable steel, a material chosen for its strength and longevity in a high-stress reloading environment. Each unit is a single die, meaning you’ll need one for each caliber you reload in the appropriate configuration. The color is a classic silver, indicative of machined steel.

These dies are exclusively for use with straight-wall pistol calibers, 9mm and larger, and crucially, only on progressive reloading presses. This limitation is key to their function; they detect anomalies in the case-filling stage of a progressive operation. The die’s core function is to physically stop the ram’s travel if a case is under-filled (no powder) or over-filled (double charge), forcing the reloader to correct the issue before proceeding. This USA-made component is built to endure the rigors of consistent use.

Performance & Functionality

The primary job of the RCBS Lock-Out Reloading Dies is to act as a physical failsafe, and it excels at this task. Its ability to detect both an empty case and a double-charged case is remarkable. The mechanical lock-up is the standout feature, providing an unmistakable signal that something is wrong.

The main strength is its absolute certainty; there is no room for interpretation or a missed visual cue. It will not let you continue without addressing the improperly charged cartridge. The only real weakness, though not a flaw in its design, is its limitation to straight-wall pistol calibers and progressive presses. This specificity means it’s not a universal solution for all reloading needs, particularly for rifle cartridges or single-stage presses. Still, for its intended application, its performance is unparalleled.

Design & Ergonomics

The design of this reloading die is intentionally minimalist and robust. Crafted from solid steel, it feels substantial and durable, built to withstand the forces exerted during the reloading cycle. Its silver finish is functional rather than decorative, a hallmark of precision tooling.

Ergonomically, it’s designed to be part of a press, so its “in-hand” feel is less relevant than its integration into the machine. The die threads into the press head like any other, and its operation is entirely automatic once set up. There’s no complex lever or button to engage; the lock-out mechanism is purely internal and reactive. The simple, no-nonsense design ensures reliability, with no delicate parts to break or adjust incorrectly.

Durability & Maintenance

Built from steel, the durability of the RCBS Lock-Out Reloading Dies is essentially a lifetime proposition under normal reloading conditions. I’ve had mine for years without any hint of structural compromise or functional decline.

Maintenance is exceptionally straightforward. A light application of lubricant on the die threads during installation is generally all that’s needed, alongside periodic wiping down to remove powder residue. There are no complex internal components requiring special care. Its inherent simplicity means there are very few potential failure points, making it a highly reliable piece of equipment.

Accessories and Customization Options

The RCBS Lock-Out Reloading Dies come as a single die, and there are no included accessories. This is a tool designed to be integrated directly into your existing progressive reloading press setup.

There are no real customization options for the die itself, other than its proper adjustment for the specific cartridge you are loading. However, RCBS does offer these lock-out dies in various calibers, so you would purchase the specific caliber die that matches your needs, such as a .355 Caliber die for 9mm, or a separate one for .40 S&W. This ensures optimal function for each cartridge.

Pros and Cons of RCBS Lock-Out Reloading Dies

Who Should Buy RCBS Lock-Out Reloading Dies?

This die is an absolute must-have for any handloader who uses a progressive reloading press for straight-wall pistol calibers. If you’ve ever experienced a moment of distraction while reloading, or if you simply want the highest level of certainty that every round you produce is safely charged, then this product is for you. It is particularly beneficial for newer reloaders who are still developing their process, but experienced reloaders also stand to gain immense peace of mind.

Anyone reloading rifle cartridges or using a single-stage press should look elsewhere for their powder-checking needs, as this specific tool is not designed for those applications. For those reloading pistol rounds, I would also highly recommend using a quality powder dispensing system and a visual inspection method in conjunction with this die; it is the ultimate safety net, not a sole solution for achieving precise powder charges.

Conclusion on RCBS Lock-Out Reloading Dies

The RCBS Lock-Out Reloading Dies are, without hyperbole, one of the most important safety devices you can add to your progressive reloading setup. For a modest price, they provide a level of assurance against catastrophic reloading errors that is simply unmatched by other methods. The steel construction speaks to its durability, and the ingenious mechanical lock-out system is both elegant and incredibly effective.

While it’s limited in application to straight-wall pistol calibers on progressive presses, within that niche, it is a game-changer. The peace of mind it offers, preventing potentially dangerous squib loads or over-pressure events, far outweighs its cost. If you reload pistol ammunition on a progressive press, I wholeheartedly recommend investing in this die. It’s a simple, reliable, and highly effective guardian against reloading mistakes that no serious handloader should be without.