The pursuit of extreme long-range (ELR) precision and terminal performance at distance has led to the development of specialized components that can handle the massive case capacities of modern ultra-magnum cartridges. Among these, Vihtavuori N570 stands as a pinnacle achievement. Engineered by the Finnish propellant experts at Vihtavuori, this powder was specifically designed to address the unique needs of shooters using the heaviest projectiles in the largest calibers. As a high-energy, double-base powder with an exceptionally slow burn rate, Vihtavuori N570 provides the sustained pressure necessary to accelerate heavy-for-caliber bullets to velocities that single-base powders often cannot reach within safe pressure limits.
Executive Summary
- Main Application: Optimized for ultra-large capacity magnum cartridges and Extreme Long Range (ELR) shooting.
- Key Advantage: Exceptional energy density that provides higher velocities in large cases compared to traditional single-base powders.
- Burn Rate: Extremely slow; one of the slowest propellants in the Vihtavuori consumer line.
- What This Guide Covers: A comprehensive technical analysis of Vihtavuori N570, including grain geometry, 4-way market comparison, metering equipment recommendations, and optimized component pairings for elite-level accuracy.
Best For: ELR competitors, professional snipers, and extreme-range hunters using 338 Lapua Magnum, 300 PRC, or 30-378 Weatherby Magnum.
Powder Description & Technical Profile
Vihtavuori N570 is a member of the prestigious N500 series, which signifies its “High Energy” status. Unlike the N100 series, which are pure single-base nitrocellulose propellants, Vihtavuori N570 incorporates a controlled percentage of nitroglycerin into the grain structure. This addition increases the caloric value of the powder, allowing for a more energetic burn without requiring a massive increase in charge weight. This characteristic is particularly beneficial when loading for cartridges where case capacity is the primary limiting factor for velocity.
The physical profile of Vihtavuori N570 consists of large, perforated extruded sticks. These grains are significantly larger than those found in mid-range powders like Vihtavuori N550 or even Vihtavuori N565. The sheer size of the grain is a deliberate design choice to slow the initial pressure spike. By increasing the surface area and volume of the individual stick, Vihtavuori engineers have created a propellant that burns progressively, providing a “heavy push” rather than a “sharp kick.”
The “Expert Feel” of Vihtavuori N570 is one of incredible consistency once the proper load node is found. Shooters often describe the recoil impulse as a prolonged shove, which helps in maintaining a steady sight picture during the recoil cycle of heavy rifles. Because it is a double-base powder, Vihtavuori N570 is also treated with modern anti-fouling agents that specifically target copper buildup, a critical feature for high-velocity magnum shooters who otherwise face frequent barrel cleaning intervals.
Pros & Cons
- Pro: Market-leading energy density allows for maximum velocity in ELR applications.
- Pro: Outstanding temperature stability, ensuring point-of-impact (POI) consistency in varied climates.
- Pro: Integrated decoppering agents extend the accuracy life of high-performance barrels.
- Pro: Extremely consistent ignition when used with high-quality magnum primers.
- Con: Large grain size makes volumetric metering through traditional measures very difficult.
- Con: Higher abrasive characteristics can lead to faster throat erosion compared to single-base alternatives.
- Con: Requires very large charge weights, resulting in fewer rounds loaded per pound of powder.
Technical Characteristics
The technical specifications of Vihtavuori N570 reflect its status as a specialized propellant for big-bore and heavy-magnum rifles. Its bulk density is specifically tuned to fill the cavernous cases of the 338 class of cartridges.
| Attribute | Specification |
| Grain Type | Large Perforated Extruded (Stick) |
| Base | Double-Base (High Energy) |
| Density (g/l) | 910-930 |
| Burn Rate Category | Ultra-Slow |
| Primary Coating | Decoppering and Graphite Finish |
Temperature Stability & Burn Rate Analysis
In the realm of ELR shooting, where targets are engaged at 1500-2500 yards, temperature stability is not a luxury – it is a requirement. A shift of 25 FPS due to a 20-degree temperature change can result in a vertical miss of several feet at two miles. Vihtavuori N570 is engineered to be exceptionally resistant to environmental changes. Its chemical stabilizers ensure that the burn rate remains consistent from the freezing temperatures of a late-season mountain hunt to the intense heat of a desert competition.
While many high-energy powders are historically sensitive to heat, Vihtavuori N570 breaks this trend. It maintains a velocity profile that rivals the best single-base “extreme” powders. On average, shooters report a velocity variation of approximately 0.4-0.6 FPS per degree Fahrenheit, which is considered elite performance for a double-base magnum propellant.
Stability Comparison Table
| Powder | Stability Rating | Typical FPS Variation |
| Vihtavuori N570 | Excellent | 0.4-0.6 FPS per degree |
| Vihtavuori N568 | Benchmark | 0.3-0.5 FPS per degree |
| Alliant Reloder 33 | High | 0.5-0.7 FPS per degree |
| Alliant Reloder 22 | Sensitive | 1.0-1.5 FPS per degree |
Powder Comparison
To accurately place Vihtavuori N570 within the reloading ecosystem, it is helpful to compare it against four key competitors: two that burn faster and two that burn slower.
- Vihtavuori N568: A slightly faster option than Vihtavuori N570. It is often used in cartridges like 7mm PRC where Vihtavuori N570 might be too slow to achieve full combustion in standard barrel lengths.
- Hodgdon Retumbo: A direct competitor in the slow-magnum category. While Hodgdon Retumbo is a single-base powder known for consistency, Vihtavuori N570 often provides 40-70 FPS more velocity in the same cartridge due to its double-base energy.
- Vihtavuori 24N41: This is a slower-burning powder, originally designed for the 50 BMG. It is a single-base propellant used in massive cases where Vihtavuori N570 might generate too much pressure too quickly.
- Hodgdon H50BMG: The standard for 50-caliber rifles. It is significantly slower than Vihtavuori N570 and is primarily used for projectiles over 600 grains in cartridges with massive case capacities.
Comparison Table: ELR Propellants
| Powder Name | Burn Rate | Density (g/l) | Primary Cartridges |
| Vihtavuori N568 | Very Slow | 950 | 7mm PRC, 300 PRC |
| Hodgdon Retumbo | Extremely Slow | 915 | 28 Nosler, 300 RUM |
| Vihtavuori N570 | Ultra-Slow | 920 | 338 Lapua, 30-378 Wby |
| Vihtavuori 24N41 | ELR Specialist | 940 | 375 CheyTac, 50 BMG |
| Hodgdon H50BMG | Slower | 935 | 50 BMG, 416 Barrett |
Performance, Metering & Equipment
The large grain size of Vihtavuori N570 presents a significant challenge for precision metering. Standard drum-style powder measures will often “shear” the long grains, resulting in charge weight variations of several grains. This level of inconsistency is unacceptable for long-range shooting. To achieve the best results with Vihtavuori N570, it is mandatory to use high-end digital scales or automated trickling systems.
We highly recommend the use of the RCBS MatchMaster Digital Powder Scale & Dispenser or the Hornady Auto Charge Pro Digital Powder Scale and Dispenser with Free GS-1500 Digital Powder Scale. These units are capable of handling large-grain extruded powders by vibrating or rotating the grains into the pan, minimizing the risk of over-throws caused by grain bridging. For those seeking the ultimate in precision, hand-weighing each charge and using a Frankford Arsenal Powder Trickler for the final 0.1 grain is the preferred method of elite ELR shooters.
Fouling management is another area where Vihtavuori N570 excels. High-velocity magnum cartridges are notorious for leaving significant copper deposits in the bore. The decoppering agents in Vihtavuori N570 work during the firing cycle to keep these deposits from hardening, allowing the shooter to maintain accuracy through 50-70 round strings without needing to stop for a deep cleaning of the barrel.
Recommended Cartridges and Applications
Vihtavuori N570 is the king of the “large-bore” magnum world. It is rarely the correct choice for standard hunting cartridges like the 308 Winchester or 30-06 Springfield, as it is simply too slow to ignite properly in those cases.
| Cartridge | Primary Application |
| 338 Lapua Magnum | The primary application; ELR Competition and Sniper use |
| 300 PRC | Perfect for the heaviest 230-250 grain bullets |
| 30-378 Weatherby Magnum | Extreme velocity for large game hunting |
| 338 Remington Ultra Magnum | High-energy heavy-bullet hunting |
| 28 Nosler | ELR performance with 195 grain 7mm projectiles |
| 338 Edge | Custom ELR builds requiring maximum case fill |
| 375 CheyTac | Entry-level ELR for massive solids |
Bullets
Vihtavuori N570 is specifically tuned for high-BC, heavy-weight bullets. Using light bullets with this powder often results in incomplete combustion, high velocity spreads, and heavy unburnt powder in the barrel.
| Caliber | Recommended Weight (Grains) | Recommended Models |
| 7mm | 180-195 | Berger Hybrid Target, Sierra MatchKing |
| 30 Caliber | 215-250 | Hornady A-Tip, Berger EOL Hunter |
| 338 Caliber | 250-300 | Lapua Scenar-L, Berger Hybrid |
| 375 Caliber | 350-400 | Warner Tool Solids, Cutting Edge Lazers |
Primers
Because Vihtavuori N570 is a double-base powder with a high energy density and very large grain size, consistent ignition is paramount. A weak primer will lead to “hang-fires” or large standard deviations (SD) in velocity. We recommend only using high-output magnum primers.
- Federal 215: Generally considered the best all-around choice for Vihtavuori N570.
- CCI 250: A very hot magnum primer that provides excellent ignition in sub-zero hunting conditions.
- RWS 5333: A premium European option known for the highest levels of consistency.
- Winchester WLRM: A robust primer that handles the high-volume charges of Vihtavuori N570 with ease.
- Remington 9-1-2M: A reliable magnum choice for traditional Weatherby-style cases.
- Federal GM215M: The Gold Medal Match version of the 215, ideal for ELR competition.
- Fiocchi Large Rifle Magnum: A consistent choice for those who prefer international brands.
- CCI No. 34: A “mil-spec” primer with a harder cup, often used for extra safety in large semi-auto rifles.
Conclusion & Expert Verdict
Vihtavuori N570 is not merely a propellant; it is the enabler of extreme long-range success. While it requires specialized equipment to meter correctly and a high degree of technical skill to tune, the rewards are undeniable. The combination of ultra-slow burn rates and high energy density allows the 338 Lapua Magnum and other large-capacity cartridges to reach their full potential. For the shooter who refuses to compromise on velocity or temperature stability, Vihtavuori N570 remains the gold standard in its class.
Expert Pro Tip: When loading Vihtavuori N570, always use a long drop tube (at least 4-5 inches) on your funnel. The large grains of Vihtavuori N570 tend to bridge easily in the neck of the case. A slow pour through a drop tube allows the grains to stack more efficiently, often providing an additional 3-5 percent of usable case volume. This can be the difference between a heavily compressed load and a load that sits perfectly at the base of the bullet’s neck.
