In the pursuit of the perfect service rifle load, few propellants carry the prestige of Accurate 2520. Often referred to by competitive shooters as the “Camp Perry Powder,” this medium-burning, double-base spherical propellant was specifically engineered to dominate in the high-stress environment of X-course competition. Its reputation is built on a foundation of exceptional metering consistency and its ability to push heavy-for-caliber bullets to high velocities while maintaining the precise pressure curves required by gas-operated systems.
Whether you are loading for a match-grade 223 Remington or a service-ready 308 Winchester, Accurate 2520 offers a unique combination of high-energy density and ballistic uniformity. This guide explores the technical profile and application strategies that make this propellant a staple for precision reloaders.
Executive Summary
- Main Application: High-precision service rifle competition and medium-game hunting.
- Key Advantage: Superior volumetric metering and optimized pressure for heavy bullets in gas-operated rifles.
- Burn Rate: Medium rifle propellant, slightly slower than Accurate 2495.
- What This Guide Covers: Technical specifications, thermal performance, a 4-way comparison, and optimized component pairings.
Best For: Competitive shooters using heavy bullets in AR-15 or M1A platforms and hunters seeking maximum velocity from medium-capacity cases.
Powder Description & Technical Profile
Accurate 2520 is a double-base, spherical propellant. Unlike extruded (stick) powders, its spherical geometry allows it to flow through powder measures with a level of fluidity that ensures nearly identical charge weights with every throw. This characteristic is vital for high-volume reloading where weighing every individual charge is not practical.
The Expert “Feel”
The “feel” of Accurate 2520 is defined by its smooth pressure rise and consistent port pressure. In the 308 Winchester, it is particularly renowned for its performance with 168-grain and 175-grain projectiles, providing the “punch” needed for long-range stability without the erratic pressure spikes that can occur with faster propellants. It is a high-energy powder that provides a significant “kick” in velocity compared to single-base powders in the same burn range.
Pros & Cons
- Pros:
- Unmatched metering consistency in volumetric measures.
- High energy density allows for impressive velocities in smaller cases.
- Excellent for heavy-bullet 223 Remington and 308 Winchester loads.
- Includes flash suppressants for reduced visual signature.
- Cons:
- Slightly more sensitive to temperature swings than modern extruded powders.
- Requires consistent neck tension to ensure uniform ignition due to its double-base nature.
Technical Characteristics
The chemical composition of Accurate 2520 makes it a high-performance option for those needing to maximize case capacity efficiency.
| Property | Specification |
| Manufacturer | Accurate Powders |
| Powder Type | Spherical (Ball) |
| Base | Double-Base |
| Density | 0.965-0.985 g/cc |
| Burn Rate Category | Medium Rifle |
| Coating | Flash Suppressant and Deterrent Treated |
Temperature Stability & Burn Rate Analysis
As a double-base spherical powder, Accurate 2520 is subject to more variance in velocity as temperatures fluctuate compared to “extreme” single-base stick powders. In testing, it typically shows a velocity shift of 0.8-1.2 FPS per degree Fahrenheit.
For the service rifle competitor, this means that a load developed in 50°F weather may see a significant increase in pressure and point of impact when shooting in 95°F summer matches. It is highly recommended to stay slightly below maximum charge weights if the ammunition will be used in extreme heat.
Stability Benchmark Comparison
| Powder Name | Stability Level | Tech Category |
| Accurate 2520 | Standard | Double-Base Spherical |
| Hodgdon Varget | Extreme | Insensitive Extruded |
| Winchester 748 | Sensitive | Traditional Spherical |
Powder Comparison
Accurate 2520 competes in one of the most popular segments of the reloading market.
- Hodgdon Varget: The primary rival for accuracy. While Varget is more temperature-stable, Accurate 2520 meters much more smoothly in progressive presses.
- Winchester 748: A very similar spherical powder. Accurate 2520 is generally considered a “newer” technology with better flash suppression and more consistent performance with heavier bullets.
- Alliant Reloder 15: Sits in a similar burn rate window. Reloder 15 is an extruded powder that often produces slightly higher velocities in 308 Winchester but lacks the easy metering of Accurate 2520.
- Accurate 2460: The faster spherical brother to Accurate 2520. Accurate 2460 is better for lighter bullets (55-grain in 223 Remington), whereas Accurate 2520 owns the heavy-bullet category.
Competitor Comparison Table
| Powder | Burn Rate | Density (g/cc) | Primary Cartridges |
| Accurate 2520 | Medium | 0.970 | 308 Winchester, 223 Remington |
| Hodgdon Varget | Medium | 0.885 | 308 Winchester, 6.5 Creedmoor |
| Winchester 748 | Medium-Fast | 0.980 | 30-30 Winchester, 223 Remington |
| Accurate 2460 | Medium-Fast | 0.975 | 223 Remington, 308 Winchester |
| Alliant Reloder 15 | Medium | 0.925 | 223 Remington, 30-06 Springfield |
Performance, Metering & Equipment
Metering Consistency
The spherical shape of Accurate 2520 makes it the “king” of the powder measure. Even a budget-friendly Lee Perfect Powder Measure will throw this powder with surprising accuracy. For those utilizing progressive presses like the Dillon XL-750, Accurate 2520 ensures that every round is consistent, which is critical for maintaining accuracy over a 60-shot match.
Fouling and Cleanliness
Modern spherical powders like Accurate 2520 are treated to burn cleaner than the “ball” powders of previous generations. While you may see slightly more carbon at very low pressures, at the higher pressures typical of service rifle match loads, it burns remarkably clean. This is essential for maintaining accuracy during long strings of fire without cleaning.
Recommended Cartridges and Applications
The flexibility of Accurate 2520 allows it to perform in a wide variety of cartridges, though it truly shines in medium-capacity rifles.
| Cartridge | Primary Application |
| 223 Remington | Heavy bullets (75-80 grain) for 600-yard stages |
| 308 Winchester | Standard 168-grain match loads |
| 30-06 Springfield | Modern hunting loads with lighter bullets |
| 6.5 Creedmoor | High-velocity hunting loads with 120-grain bullets |
| 30-30 Winchester | Maximum velocity for lever-action hunting |
| 7mm-08 Remington | Balanced accuracy and speed |
Recommended Bullets
To leverage the high energy of Accurate 2520, use bullets that benefit from a strong, consistent push.
| Bullet Brand/Model | Recommended Weight | Application |
| Sierra MatchKing | 77 grain (223) or 168 grain (308) | Competition |
| Hornady ELD Match | 168-175 grain | Precision Target |
| Nosler AccuBond | 150-165 grain | Big Game Hunting |
| Berger Hybrid Target | 155-175 grain | Long-Range |
| Sierra GameKing | 150-165 grain | All-Purpose Hunting |
Primers
Spherical powders can sometimes be harder to ignite than stick powders, so using a high-quality primer is essential for lowering Standard Deviation (SD).
- CCI 450: A magnum small rifle primer often used to ensure complete ignition of Accurate 2520 in 223 Remington.
- CCI BR-4: Benchrest small rifle primer for the absolute lowest velocity spreads.
- Federal GM210M: The “gold standard” for 308 Winchester match loads.
- Winchester WLR: A high-output primer that works well for igniting double-base powders.
- Remington 7-1-2: A durable small rifle primer for high-pressure loads.
- CCI 34: Essential for semi-autos like the M1A or AR-10 to prevent slam-fires.
- RWS 4033: Premium European small rifle primer for match consistency.
- Federal 205: A standard reliable option for small rifle applications.
- Fiocchi Small Rifle Magnum: An excellent alternative for ensuring consistent ignition in cold weather.
Conclusion & Expert Verdict
Accurate 2520 remains a dominant force in the world of competitive reloading. Its unique blend of high energy and effortless metering makes it the logical choice for any reloader who needs to produce hundreds of rounds of match-grade ammunition quickly. While modern “extreme” powders may offer slightly better temperature stability, they cannot match the physical performance of Accurate 2520 in a volumetric powder measure.
If your goal is to win matches or harvest game with a high-velocity, consistent load that won’t punish you at the reloading bench, Accurate 2520 is an elite-tier propellant.
Expert Pro Tip: To get the best results with Accurate 2520, ensure your sizing die is providing at least 0.002-0.003″ of neck tension. Because spherical powders like Accurate 2520 are denser and slightly harder to ignite than stick powders, firm neck tension helps build the consistent initial pressure required for a uniform burn and lower velocity variations.
