The Professional Guide to Magnum Ignition
The Remington 5-1/2 Small Pistol primer is a specialized high-performance component engineered to meet the demanding requirements of high-pressure handgun cartridges. While many reloaders are familiar with standard small pistol primers, the Remington 5-1/2 Small Pistol belongs to the magnum category, specifically designed to handle the increased chamber pressures and slower-burning propellants common in modern magnum handguns. Known for its exceptional cup integrity and reliable energetic output, the Remington 5-1/2 Small Pistol has become a staple for marksmen loading the 357 Magnum and high-intensity cartridges like the 357 SIG.
For the expert handloader, the Remington 5-1/2 Small Pistol represents more than just an increase in flame temperature. It is a structural solution to the ballistic challenges posed by small-volume, high-pressure cases. The manufacturing tolerances maintained by Remington ensure that each Remington 5-1/2 Small Pistol provides a consistent “hot” spark that can effectively penetrate deep powder columns, ensuring uniform combustion even in adverse environmental conditions. Whether you are loading for a classic hunting revolver or a modern semi-automatic tactical pistol, the Remington 5-1/2 Small Pistol offers the mechanical reliability needed for peak performance.
Best For: Handloaders specialized in high-pressure handgun calibers such as 357 Magnum and 357 SIG who utilize slow-burning spherical powders and require a primer that resists cup piercing at 35,000 PSI and above.
- Primer Type: Small Pistol Magnum
- Key Advantage: Thicker cup walls and high-heat initiator for high-pressure stability
- Primary Match: 357 Magnum, 357 SIG, and 9mm Major
- Target Audience: Magnum handgun hunters, silhouette shooters, and competition reloaders
Technical Specifications
The Remington 5-1/2 Small Pistol is defined by its precision-stamped brass cup and a highly energetic lead styphnate initiator. Unlike standard primers, the magnum initiator in the Remington 5-1/2 Small Pistol produces a longer-duration flame front, which is essential for igniting powders with high deterrent coatings.
| Feature | Specification |
| Manufacturer | Remington Arms (USA) |
| Primer Size | Small Pistol |
| Category | Magnum Force |
| Intended Use | High-pressure / Slow-powder handgun loads |
| Packaging | 100-count trays / 1000-count bricks |
| Typical Pressure Rating | Up to 40,000+ PSI |
| Action Compatibility | Revolver, Semi-auto, Bolt-action Handguns |
A critical technical detail of the Remington 5-1/2 Small Pistol is its dimensional consistency. The diameter is held to strict standards to ensure a tight interference fit in the primer pocket, which helps seal high-pressure gases and prevents primer “leaking” or “flowing” around the edges. The anvil geometry of the Remington 5-1/2 Small Pistol is also optimized to provide a sensitive “crush” zone, ensuring ignition even with standard-weight factory firing pin springs.
Positioning and Brand Heritage
Remington has one of the longest-standing reputations in the American munitions industry, and the Remington 5-1/2 Small Pistol is a direct result of their historical development of the 357 Magnum cartridge. In the Remington product lineup, the Remington 5-1/2 Small Pistol is the structural “big brother” to the Remington 1-1/2. While the 1-1/2 is intended for low-pressure rounds like the 38 Special, the Remington 5-1/2 Small Pistol is built to withstand the much higher pressures of magnum loads.
In the broader market, the Remington 5-1/2 Small Pistol is positioned as a premium magnum initiator. It competes directly with the CCI 550 and the Winchester WSPM. Reloaders often choose the Remington 5-1/2 Small Pistol for its specific cup hardness, which many believe sits in a “sweet spot” between the very hard CCI and the more sensitive Federal offerings. This heritage of providing specialized components for specific pressure regimes makes the Remington 5-1/2 Small Pistol an essential part of the serious reloader’s inventory.
Compatibility and Safety Constraints
When utilizing the Remington 5-1/2 Small Pistol, understanding cup hardness is paramount. Standard primers often use thinner metal to aid sensitivity in low-pressure revolvers, but the Remington 5-1/2 Small Pistol uses a reinforced cup designed to prevent the firing pin from “piercing” the primer at peak pressure. This makes it exceptionally safe for use in modern semi-autos and high-velocity revolvers. However, the slightly harder cup of the Remington 5-1/2 Small Pistol means that if a firearm has an excessively lightened competition trigger, there may be a higher risk of light-strike misfires compared to using a standard-force primer.
For seating, the Remington 5-1/2 Small Pistol should be seated 0.003-0.005 inches below the case head flush. This depth ensures the anvil is properly pre-sensitized against the bottom of the primer pocket. Handloaders using a RCBS Rock Chucker Supreme or a high-volume Dillon XL 750 will find that the Remington 5-1/2 Small Pistol provides a clear tactile “seat” feel.
Mandatory Safety Warning: The Remington 5-1/2 Small Pistol is a magnum-force primer. Do not substitute it for a standard small pistol primer in established load data without reducing your powder charge. The increased energetic output of the Remington 5-1/2 Small Pistol can cause significant pressure spikes that may lead to overpressure conditions, potentially damaging your firearm or causing injury. Always reduce starting loads and work up carefully.
Recommended Cartridges and Applications
The Remington 5-1/2 Small Pistol is the primary choice for any cartridge that utilizes a small pistol pocket but operates at high pressures or requires significant ignition heat.
| Cartridge | Primary Application |
| 357 Magnum | Full-power Hunting and Defensive Loads |
| 357 SIG | High-Velocity Duty and Tactical Loads |
| 9mm Luger (9mm Major) | Open Division Competition Loads |
| 40 SW (High-Pressure) | Heavy-bullet Target and Defensive Loads |
| 327 Federal Magnum | High-Intensity Small Bore Revolver Loads |
In the 357 Magnum, the Remington 5-1/2 Small Pistol is necessary to ensure that the large volume of slow-burning powder initiates consistently. For competition shooters loading 9mm Major—which pushes the 9mm Luger case into extremely high-pressure territory—the Remington 5-1/2 Small Pistol offers the cup durability required to prevent primer cratering or flowing into the firing pin hole. Similarly, the 357 SIG benefits from the Remington 5-1/2 Small Pistol due to the cartridge’s high bottleneck pressure and short ignition window.
Powder Pairings
The Remington 5-1/2 Small Pistol is designed to work in synergy with powders that are notoriously difficult to ignite, particularly spherical vs extruded powder varieties with heavy deterrent coatings.
- Magnum Spherical Powders: This primer is the ideal partner for Winchester 296 and Hodgdon H110. These powders are famous for requiring a magnum spark for reliable performance; without the Remington 5-1/2 Small Pistol, these powders can exhibit erratic velocities or even “squib” loads in cold weather.
- Dense Ball Powders: For high-velocity 9mm or 40 SW, the Remington 5-1/2 Small Pistol pairs well with Accurate No. 7 or Accurate No. 9. These dense powders fill the case and require the penetrating flame of a magnum primer to ensure the entire column initiates simultaneously.
- Intermediate Magnum Powders: While Alliant 2400 is often used with standard primers, the Remington 5-1/2 Small Pistol can provide improved velocity consistency with Alliant 2400 in cold weather or in short-barreled revolvers where ignition time is limited.
Comparison and Alternatives
If you cannot source the Remington 5-1/2 Small Pistol, you must look for other magnum-rated Small Pistol primers that offer similar cup strength and heat output.
- CCI 550: Often considered the most direct competitor. The CCI cup is generally harder than the Remington 5-1/2 Small Pistol, which is excellent for high pressure but may require a stronger firing pin spring.
- Winchester WSPM: Known for a very hot flash. It is a highly effective alternative for 357 Magnum loads but may show pressure signs (flattening) slightly sooner than the Remington 5-1/2 Small Pistol.
- Federal 200: Federal’s magnum offering. Like all Federal primers, it is more sensitive than the Remington 5-1/2 Small Pistol, making it a great choice for revolvers with lighter trigger pulls that still need magnum ignition.
- CCI 400: While technically a Small Rifle primer, some competition shooters use these in high-pressure 9mm Major loads due to the thicker cup. This is an advanced technique and requires careful load workup.
- Fiocchi Small Pistol Magnum: A European magnum alternative that provides consistent ignition and a high-quality nickel-plated finish.
- Ginex Small Pistol Magnum: A very hard European primer that is excellent for high-pressure safety but can be difficult to seat in some domestic brass.
- Sellier & Bellot V361617: Another European magnum primer known for reliability and cost-effectiveness in high-volume loading.
FAQ
Can I use the Remington 5-1/2 Small Pistol in 38 Special?
It is not recommended unless the load data specifically calls for it. Using the Remington 5-1/2 Small Pistol in a standard-pressure 38 Special load can cause erratic pressures and may result in harsh recoil or dangerous pressure levels in older firearms.
Why does the 5-1/2 have a thicker cup?
Magnum cartridges like the 357 Magnum operate at significantly higher pressures than standard rounds. The Remington 5-1/2 Small Pistol uses a thicker cup to prevent the metal from “flowing” or piercing under these extreme conditions.
Will the Remington 5-1/2 Small Pistol improve my accuracy?
If you are using slow-burning ball powders, the Remington 5-1/2 Small Pistol will likely improve accuracy by providing more consistent ignition, which reduces velocity spreads (Standard Deviation).
Is there a difference between the 1-1/2 and the 5-1/2?
Yes. The Remington 1-1/2 is for standard pressure (e.g., 38 Special, 9mm), while the Remington 5-1/2 Small Pistol is a magnum primer for high pressure and slow powders. They are not interchangeable.
Are these primers suitable for 357 SIG?
Yes, the Remington 5-1/2 Small Pistol is an excellent choice for the 357 SIG due to that cartridge’s high operating pressure.
How should I store Remington 5-1/2 Small Pistol primers?
Like all primers, the Remington 5-1/2 Small Pistol should be stored in a cool, dry place in its original packaging to prevent contamination and ensure long-term stability.
Conclusion & Expert Verdict
The Remington 5-1/2 Small Pistol is a premium ballistic component that offers the structural integrity and energetic reach required for high-performance handgunning. Its reputation for handling the intense pressures of the 357 Magnum and the high-cycle demands of modern semi-automatics has made it a favorite among professional reloaders. By providing a sustained, intense flame, the Remington 5-1/2 Small Pistol ensures that even the most stubborn propellants burn cleanly and predictably, regardless of the temperature.
In the specialized world of magnum reloading, the Remington 5-1/2 Small Pistol stands as a testament to American manufacturing quality. It provides a level of certainty that is essential when working at the upper limits of handgun performance. If your loading goals involve high velocity, heavy bullets, and slow powders, the Remington 5-1/2 Small Pistol is a foundational component that you can rely on for safety and precision.
Expert Pro Tip: When working with the Remington 5-1/2 Small Pistol and slow ball powders like Winchester 296, always apply a firm roll crimp to your cartridges. The Remington 5-1/2 Small Pistol provides a significant initial pressure wave; without a solid crimp to hold the bullet in place for those first few milliseconds, the primer can actually push the bullet into the rifling before the powder fully ignites, leading to erratic velocities and poor accuracy. A consistent crimp paired with the Remington 5-1/2 Small Pistol is the secret to match-winning magnum performance.
