The Alliant Reloder 26 is a high-performance, smokeless magnum rifle powder that has revolutionized the expectations for velocity in modern long-range shooting. Developed by Alliant Powder and manufactured in Switzerland by Nitrochemie, this propellant utilizes advanced EI technology to push heavy-for-caliber bullets to speeds previously unattainable with traditional powders. By employing a sophisticated impregnation coating process, Alliant Reloder 26 achieves a high energy density and a progressive burn rate that maximizes the work done on the projectile while maintaining manageable pressure levels. It has quickly become a “gold standard” for cartridges like the 28 Nosler, 300 Winchester Magnum, and the 6.5 PRC, where maximizing the ballistic coefficient of heavy bullets is the primary objective.
Executive Summary
- Main Application: Delivering ultra-high velocities in high-capacity magnum and overbore rifle cartridges.
- Key Advantage: Advanced EI technology that provides a unique blend of high energy density and controlled pressure.
- Burn Rate: Very slow, specifically positioned between the burn speeds of Alliant Reloder 22 and Alliant Reloder 33.
- What This Guide Covers: Comprehensive technical analysis of EI technology, temperature stability metrics, competitive market comparisons, and optimized component compatibility for precision reloading.
Best For: Extreme long-range shooters and hunters seeking maximum kinetic energy and flatter trajectories.
Powder Description & Technical Profile
The Alliant Reloder 26 is an extruded, or stick-type, propellant designed for the most demanding magnum applications. Unlike standard double-base powders that are simply coated with deterrents, Alliant Reloder 26 is produced using a specific impregnation process that integrates the energy-controlling elements deeper into the grain structure. This allows for a more linear energy release throughout the burn cycle.
Physical Properties
- Type: Extruded (Stick)
- Technology: EI (Impregnation) Technology
- Density: 99.9 lbs/ft³ (Bulk Density: 0.989 g/cc)
- Composition: Contains a proprietary de-coppering additive (tin and bismuth) to reduce barrel fouling.
The Expert “Feel”
Reloaders often note that Alliant Reloder 26 feels “denser” than many of its contemporaries. This high bulk density is critical because it allows the shooter to fit more of this slow-burning powder into the case, ensuring high load density which is a prerequisite for low velocity spreads (ES/SD). During ignition, the powder provides a sustained, powerful push rather than a sharp, peaky pressure spike. This characteristic is particularly beneficial when pushing projectiles like the 215 grain Berger Hybrid in a 300 Winchester Magnum, where the barrel length can be fully utilized to build velocity.
Pros & Cons
- Pros:
- Produces industry-leading velocities, often 50-100 FPS faster than competing powders in similar pressure brackets.
- Proprietary de-coppering additive significantly extends the interval between deep cleanings by sweeping copper out with each shot.
- High bulk density maximizes case fill for better ignition consistency.
- Free of DNT (Dinitrotoluene) and DBP (Dibutyl phthalate), making it more environmentally friendly.
- Cons:
- Higher “heat index” compared to some single-base powders, which may lead to accelerated throat erosion if used in rapid-fire strings.
- Can exhibit sensitivity to extreme high temperatures (above 85-90°F), potentially leading to pressure spikes in max-load recipes.
- High demand often leads to limited availability on the retail market.
Burn Rate and Temperature Stability
The burn rate of Alliant Reloder 26 is carefully tuned for large-volume cases. It is frequently compared to Hodgdon H1000, but technical charts generally place it slightly slower in relative burn speed while delivering higher energy.
Burn Rate Analysis
In the current marketplace, Alliant Reloder 26 occupies the space between standard “slow” powders and “ultra-slow” propellants. It is slower than Alliant Reloder 25 and Hodgdon H1000, yet it burns faster than Alliant Reloder 33 or Hodgdon Retumbo in many applications. This makes it the “sweet spot” powder for modern cartridges that are heavily overbore but not quite large enough for 50 BMG-class powders.
Temperature Sensitivity
While Alliant markets Alliant Reloder 26 as having a “consistent, controlled response to temperature changes,” real-world testing suggests a nuanced performance profile. At standard temperatures (20°F to 80°F), it is exceptionally stable, often showing variations of only 0.5 FPS per degree. However, once temperatures exceed 90°F, users have reported that the powder can become “squirrelly,” with rapid pressure increases that may blow primers if the initial load was developed at much cooler temperatures.
Stability Table
| Powder | Velocity Change (FPS per °F) | Stability Rating |
| Hodgdon H1000 | 0.21 | Extreme |
| Alliant Reloder 26 | 0.50 | Very Good (to 85°F) |
| Alliant Reloder 25 | 1.50+ | Sensitive |
Powder Comparison
Choosing Alliant Reloder 26 usually means the reloader is prioritizing velocity and energy over the ultimate temperature flatline of the Hodgdon Extreme series.
- Hodgdon H1000: The most common rival. Hodgdon H1000 is more temperature-stable at the highest end of the thermometer, but Alliant Reloder 26 will almost always produce significantly higher muzzle velocities (often 80-100 FPS more) with the same bullet weights.
- Hodgdon Retumbo: A slower alternative. Hodgdon Retumbo is often used in the 300 PRC or 28 Nosler, but its lower bulk density can make it difficult to fit enough powder into the case for top-end performance compared to the dense Alliant Reloder 26.
- Alliant Reloder 25: An older, double-base powder. Alliant Reloder 25 is faster-burning than Alliant Reloder 26 and lacks the de-coppering agents and advanced EI technology of the newer formulation. It is also significantly more temperature-sensitive.
- Vihtavuori N560: A European competitor that also uses a high-energy impregnation process. N560 is a very high-quality powder but generally has a higher cost per pound and may not reach the same peak velocities as Alliant Reloder 26 in standard magnum hulls.
Comparison Table
| Powder | Burn Rate | Density (g/cc) | Primary Cartridges |
| Alliant Reloder 26 | Very Slow | 0.989 | 6.5 PRC, 7mm Remington Magnum, 300 Winchester Magnum |
| Hodgdon H1000 | Very Slow | 0.910 | 7mm Remington Magnum, 300 Winchester Magnum |
| Hodgdon Retumbo | Ultra Slow | 0.915 | 28 Nosler, 300 PRC, 300 RUM |
| Alliant Reloder 25 | Slow-Magnum | 0.940 | 7mm STW, 25-06 Remington |
| Vihtavuori N570 | Ultra Slow | 0.960 | 338 Lapua Magnum, 30-378 Weatherby |
Applications and Performance
The performance ceiling of Alliant Reloder 26 is remarkably high, making it a favorite for those attempting to turn standard magnums into “super magnums”.
Optimal Matches
In the 243 Winchester, Alliant Reloder 26 is the premier choice for pushing heavy 105-115 grain bullets to speeds that mimic the 6mm Creedmoor. In the 6.5 Creedmoor, while considered a “slow” choice, it allows for high velocities with 147-153 grain projectiles for shooters looking for extreme long-range reach. However, its true home remains in the 7mm Remington Magnum and 300 Winchester Magnum, where it routinely outperforms almost every other propellant on the market for pure speed.
Metering and Consistency
As a stick powder, Alliant Reloder 26 granules are moderately sized. While it flows better than the “log-like” granules of some older powders, it is still best suited for automated dispensers or being hand-weighed to the tenth of a grain. The lot-to-lot consistency is reported to be excellent, meaning a load developed with one container of Alliant Reloder 26 is likely to perform nearly identically when moving to a new lot number.
Cleanliness
The inclusion of bismuth and tin is a major functional advantage for high-volume shooters. Copper fouling can degrade accuracy significantly over time, and the “self-cleaning” nature of Alliant Reloder 26 helps maintain a high level of precision for longer periods between manual bore scrubbing.
Component Compatibility and Interlinking
Cartridges and Cases
For a powder as powerful as Alliant Reloder 26, using high-quality brass is essential to ensure safety and longevity under magnum-level pressures.
| Cartridge | Recommended Brass |
| 243 Winchester | Lapua |
| 6.5 Creedmoor | Peterson |
| 6.5 PRC | ADG |
| 270 Winchester | Winchester |
| 7mm Remington Magnum | Norma |
| 300 Winchester Magnum | Lapua |
| 300 PRC | Hornady |
Bullets
To take advantage of the high velocities provided by Alliant Reloder 26, heavy, aerodynamic bullets are recommended.
| Bullet Model | Application |
| Berger VLD Hunting | Long-Range Precision Hunting |
| Hornady ELD-M | Competition and Target |
| Sierra MatchKing | Extreme Range Match |
| Nosler AccuBond | Big Game Performance |
| Barnes TTSX | High-Velocity Terminal Stability |
Primers
A Large Rifle Magnum primer is vital for the consistent ignition of the large powder columns used with Alliant Reloder 26.
| Model | Type | Best Application |
| Federal GM215M | Magnum Match | Gold standard for precision magnum loads |
| CCI 250 | Magnum | Excellent all-weather reliability |
| Winchester WLRM | Magnum | Consistent ignition for heavy hunting loads |
| Remington 9-1/2M | Magnum | Recommended for 7mm Remington Magnum |
| RWS 5333 | Magnum | Top-tier European precision loads |
| Murom KVB-7M | Magnum | Highly consistent Russian-made primers |
| CCI No. 34 | Large Rifle Military | Extra-thick cup for semi-auto safety |
| Federal 215 | Magnum | Reliable standard for heavy charges |
| S&B Large Rifle Magnum | Magnum | Effective and affordable high-volume option |
Expert Verdict
Alliant Reloder 26 has earned its reputation as the “speed king” of the reloading world. Its ability to push bullets significantly faster than traditional propellants while offering built-in de-coppering technology makes it a formidable tool for the modern marksman. While shooters must be mindful of its heat index and high-temperature pressure stability, the performance gains are often too significant for serious long-range enthusiasts to ignore.
Expert Pro Tip: When developing loads for Alliant Reloder 26, it is highly advisable to conduct your final pressure testing on a warm day (85°F or higher). Because this powder can experience a sudden pressure curve shift at high temperatures, a load that appears safe at 60°F may result in sticky bolt lifts or blown primers during a mid-summer match or a high-desert hunt. Developing a “summer-safe” load ensures year-round reliability regardless of the environment.
