The introduction of Alliant 2400 into the American reloading market over 90 years ago marked the beginning of the “Magnum Era” for handgun shooters and small-bore rifle enthusiasts. Originally developed by Hercules specifically for the 22 Hornet, Alliant 2400 has evolved into a versatile propellant that defines the performance standards for the 357 Magnum, 41 Remington Magnum, and 44 Remington Magnum. As a double-base, extruded propellant, Alliant 2400 is engineered to provide a bridge between fast-burning handgun powders and the slower-burning rifle propellants, offering a unique pressure profile that maximizes velocity in short-to-medium length barrels.
In the modern context of 2026, Alliant 2400 remains a staple on the benches of precision reloaders who value predictability over modern “high-energy” marketing claims. Its reputation for exceptional accuracy with cast lead bullets and its ability to function without the mandatory use of magnum primers makes it a distinct alternative to spherical competitors. Whether used for harvesting deer with a 44 Remington Magnum revolver or controlling varmints with a 218 Bee, Alliant 2400 delivers a consistent, high-volume gas expansion that has remained largely unchanged since its inception.
Executive Summary
- Main Application: Optimized for magnum handgun cartridges, 410 bore shotshells, and small-capacity rifle rounds.
- Key Advantage: Exceptional flexibility across pressure ranges and high compatibility with cast lead projectiles.
- Burn Rate: Fast-range rifle/Magnum pistol, positioned just faster than Hodgdon H110.
- What This Guide Covers: Technical specifications, comparative stability analysis, 4-way competitive benchmarking, and primer/bullet optimization.
Best For: Handgun hunters and cast bullet enthusiasts requiring a flexible, reliable magnum propellant.
Powder Description & Technical Profile
Alliant 2400 is a double-base, extruded powder characterized by its small, disc-shaped grain geometry. Unlike spherical powders that rely on heavy deterrent coatings to control their burn, Alliant 2400 utilizes its physical grain structure to regulate its internal ballistics. The double-base composition, which includes a percentage of nitroglycerin, ensures high energy density, allowing shooters to reach magnum velocities without needing the massive charge weights required by single-base rifle powders.
The expert “feel” of Alliant 2400 is best described as a sustained, linear push. While it reaches peak pressure rapidly, the gas volume remains consistent through the bore’s expansion. This makes it particularly effective for “heavy-for-caliber” bullets where maintaining velocity without exceeding safe pressure limits is the primary objective. In the handloading community, Alliant 2400 is frequently praised for its “forgiving” nature; unlike many spherical magnum powders, it does not exhibit the erratic pressure spikes or “squib” risks when charges are slightly reduced below the maximum listed data.
Pros & Cons
- Pros:
- Incredible versatility, performing well in everything from 22 Hornet to 454 Casull.
- Does not strictly require magnum primers for consistent ignition in most calibers.
- Legendary accuracy with cast lead bullets due to a lower initial pressure peak.
- Clean-burning at near-maximum pressures with minimal unburned residue.
- Cons:
- Small discs do not meter quite as fluidly as spherical ball powders in some measures.
- Higher nitroglycerin content generates more barrel heat during high-volume strings.
- Visible muzzle flash in shorter-barreled handguns compared to flash-suppressed modern powders.
Technical Characteristics
The following table provides the technical metrics for Alliant 2400. These specifications are derived from current Alliant manufacturing standards and verified ballistic testing.
| Property | Specification |
| Grain Type | Extruded Small Disc |
| Base Type | Double-Base |
| Bulk Density | 0.873 g/cc (54.5 lbs/ft3) |
| Relative Burn Rate | 63 (Relative Scale) |
| Coating | Graphite (Conductivity/Flow) |
| Ideal Barrel Length | 4-20 inches |
Burn Rate and Temperature Stability
Positioning Alliant 2400 within the burn rate hierarchy is critical for safe load development. It occupies a position slower than traditional “heavy” pistol powders like Accurate No. 9 but slightly faster than the popular Hodgdon H110. This makes it the “fastest” of the true magnum handgun powders, allowing it to reach efficient pressures in shorter 4-6 inch revolver barrels where slower powders might still be burning as the bullet exits the muzzle.
Temperature stability for Alliant 2400 is categorized as “Standard.” As a traditional double-base propellant, it is more susceptible to environmental changes than the Hodgdon H4198 Extreme series. Shooters can expect velocity variations of approximately 1.4-1.6 FPS per degree Fahrenheit. In high-pressure loads developed during winter months, shooters should exercise caution when firing the same loads in summer heat exceeding 90 degrees, as pressures can climb toward the maximum limit.
Stability Comparison Table
| Powder | Sensitivity Type | Estimated FPS Variation (-20 to 120°F) |
| Hodgdon H4198 | Very Low (Extreme Series) | 0.3-0.5 FPS/°F |
| Alliant 2400 | Moderate (Standard) | 1.4-1.6 FPS/°F |
| Hodgdon Lil’Gun | Moderate (Standard) | 1.2-1.6 FPS/°F |
Powder Comparison
When selecting a magnum propellant, Alliant 2400 is most often evaluated against these four competitors:
- Hodgdon H110: Slower and more energetic, H110 typically provides higher top-end velocities but is less flexible with reduced loads and strictly requires magnum primers.
- Accurate No. 9: A spherical powder that meters more easily in progressive presses but reaches its pressure ceiling faster than Alliant 2400.
- IMR 4227: Slower-burning and often results in compressed loads in smaller cases. It is generally more temperature stable but offers lower velocity in short barrels.
- Accurate 1680: Significantly slower and primarily a rifle powder. While it excels in 300 Blackout subsonics, it cannot match the versatility of Alliant 2400 in handgun applications.
Comparison Table
| Powder | Burn Rate Position | Density (g/cc) | Primary Cartridges |
| Accurate No. 9 | 60 | 0.950 | 357 Magnum, 10mm Auto |
| Alliant 2400 | 63 | 0.873 | 44 Magnum, 22 Hornet |
| Hodgdon H110 | 66 | 0.940 | 454 Casull, 30 Carbine |
| IMR 4227 | 68 | 0.920 | 300 Blackout, 450 Bushmaster |
Applications and Performance
The performance profile of Alliant 2400 is defined by its ability to ignite reliably in large-volume cases with standard primers. In the 44 Remington Magnum, a charge of 20-22 grains behind a 240 grain lead bullet has been the “standard” load for generations, providing the perfect balance of recoil, accuracy, and terminal energy. Unlike spherical powders, Alliant 2400 does not require 100% case fill to burn consistently, making it ideal for “mid-range” magnum loads that are comfortable for all-day practice sessions.
In the world of small-bore rifles, Alliant 2400 is the definitive choice for the 22 Hornet. It provides the necessary pressure to propel 35-45 grain bullets to high velocities while maintaining the low-recoil, low-noise signature that hornet enthusiasts prize. Its cleanliness at these lower pressures is significantly better than many slower rifle powders, which often leave unburned kernels in the barrel of a Hornet.
Recommended Cartridges and Applications
Alliant 2400 bridges the gap between traditional handgun calibers and specialized small rifle rounds.
| Cartridge | Primary Application |
| 357 Magnum | Maximum performance for hunting and silhouette shooting. |
| 44 Magnum | The classic choice for 240-250 grain cast or jacketed loads. |
| 22 Hornet | Original application for precision varmint control. |
| 30 Carbine | Reliable semi-auto cycling with 110 grain FMJ projectiles. |
| 300 Blackout | Specialized supersonic loads with 110-125 grain bullets. |
| 454 Casull | High-pressure heavy revolver loads for large game defense. |
| 410 Bore | The preferred powder for competitive skeet and field loads. |
Bullets
Alliant 2400 is renowned for its performance with a wide variety of projectiles, particularly those with heavy-for-caliber weights.
| Brand | Model | Weight Range (Grains) | Recommended Application |
| Hornady | V-MAX | 35-40 | 22 Hornet Varmint Precision |
| Sierra | MatchKing | 125 | 300 Blackout Supersonic Accuracy |
| Speer | DeepCurl | 158-240 | Magnum Handgun Hunting |
| Cast Performance | Lead Gas Check | 240-300 | Heavy 44 Magnum Woods Defense |
| Nosler | Ballistic Tip | 40 | High-Velocity Small Varmint |
Primers
One of the greatest advantages of Alliant 2400 is its ignition flexibility. While many magnum powders require a magnum primer to prevent “hang-fires,” Alliant 2400 often performs better with standard primers.
| Model | Type | Best Application |
| CCI 500 | Small Pistol | Standard 357 Magnum and 327 Federal loads. |
| Federal 150 | Large Pistol | Classic 44 Remington Magnum and 45 Colt loads. |
| CCI 400 | Small Rifle | Precision 22 Hornet and 218 Bee loads. |
| Winchester WSR | Small Rifle | Reliable 30 Carbine and 300 Blackout supersonic loads. |
| Remington 7-1/2 | Small Rifle Bench Rest | Maximum consistency in small-capacity varmint cases. |
| CCI 550 | Small Pistol Magnum | Cold weather 357 Magnum or heavy crimp applications. |
| Federal 155 | Large Pistol Magnum | Maximum consistency for 44 Magnum in sub-zero temps. |
| RWS 4033 | Small Rifle | High-end precision for European small-bore cartridges. |
| Murom KVB-9 | Small Pistol | Economical high-volume practice in 357 Magnum. |
| Winchester WLP | Large Pistol | A “hybrid” primer that works across all 44 Magnum loads. |
Conclusion and Expert Verdict
Alliant 2400 remains a legendary propellant because it does exactly what a magnum powder should: it provides high velocity with predictable pressure. Its dominance in the 44 Remington Magnum and 22 Hornet has lasted nearly a century for a reason. While modern spherical powders may meter more easily in a progressive press, Alliant 2400 offers a level of flexibility and safety in reduced-magnum loads that competitors simply cannot match. It is the definitive “reloader’s powder” – one that rewards attention to detail and provides match-grade accuracy in almost any magnum handgun.
Expert Pro Tip: If you are experiencing inconsistent velocities or “vertical stringing” in your 44 Remington Magnum loads with Alliant 2400, resist the urge to immediately switch to a magnum primer. Instead, check your neck tension and the strength of your roll crimp. Alliant 2400 relies on a consistent “start” to the burn; a firm crimp ensures the bullet doesn’t move before the powder has reached its initial ignition pressure, which is the most common cause of high Standard Deviation (SD) numbers with this specific propellant.
