Reliable 6mm ARC load data is published directly by major propellant and ammunition manufacturers, including Hornady, Hodgdon Powder Company, Sierra Bullets, and Vihtavuori. Published reloading data provides pressure-tested boundaries for starting charges, maximum charges, overall cartridge lengths (C.O.A.L.), and expected muzzle velocities. Data typically covers bullet weights from 55-grain light varmint options up to 112-grain heavy match projectiles. A critical factor in 6mm ARC reloading is the dual-pressure designation established by SAAMI: a 52,000 PSI Maximum Average Pressure (MAP) limit for AR-15 gas-operated rifles to protect bolt-lug integrity, and a 62,000 PSI limit for bolt-action platforms. Variations in published load recipes reflect these pressure tiers, alongside differences in test barrel length, primer type, brass capacity, and propellant burn dynamics.
6mm ARC Load Data
| Bullet | Bullet Weight | Powder | Published Starting Load | Published Maximum Load | Published Velocity | Barrel Length | Platform / Pressure Limit | Source |
| Sierra BK | 55 gr | Benchmark | 24.2 gr (3,200 fps) | 26.0 gr | 3,350 fps | 24″ | Gas Gun (52k PSI) | Sierra |
| Sierra BK | 55 gr | TAC | 28.6 gr (3,200 fps) | 31.8 gr | 3,453 fps | 24″ | Gas Gun (52k PSI) | Sierra |
| Sierra SBT | 80 gr | H335 | 26.0 gr (2,700 fps) | 27.2 gr | 2,850 fps | 24″ | Gas Gun (52k PSI) | Sierra |
| Sierra SBT | 80 gr | Benchmark | 24.2 gr (2,700 fps) | 26.0 gr | 2,850 fps | 24″ | Gas Gun (52k PSI) | Sierra |
| Sierra TGK / HPBT | 90–95 gr | 8208 XBR | 24.7 gr (2,600 fps) | 26.0 gr | 2,750 fps | 24″ | Gas Gun (52k PSI) | Sierra |
| Sierra TGK / HPBT | 90–95 gr | CFE 223 | 26.5 gr (2,600 fps) | 29.5 gr | 2,850 fps | 24″ | Gas Gun (52k PSI) | Sierra |
| Hornady ELD-X | 103 gr | CFE 223 | 26.0 gr (2,465 fps) | 28.9 gr | 2,727 fps | 24″ | Gas Gun (52k PSI) | Hodgdon / Hornady |
| Hornady ELD-X | 103 gr | LEVEREVOLUTION | 25.5 gr (2,450 fps) | 28.5 gr | 2,750 fps | 24″ | Gas Gun (52k PSI) | Hodgdon / Hornady |
| Hornady ELD Match | 108 gr | CFE 223 | 25.5 gr (2,420 fps) | 28.5 gr | 2,700 fps | 24″ | Gas Gun (52k PSI) | Hodgdon / Hornady |
| Hornady ELD Match | 108 gr | LEVEREVOLUTION | 25.0 gr (2,400 fps) | 28.2 gr | 2,710 fps | 24″ | Gas Gun (52k PSI) | Hodgdon / Hornady |
| Hornady ELD Match | 108 gr | Varget | 23.5 gr (2,350 fps) | 26.2 gr | 2,580 fps | 24″ | Gas Gun (52k PSI) | Hodgdon / Hornady |
| Hornady A-Tip | 120 gr | LEVEREVOLUTION | 24.5 gr (2,200 fps) | 28.5 gr | 2,650 fps | 24″ | Bolt Action (62k PSI) | Hornady |
| Hornady A-Tip | 120 gr | CFE 223 | 23.8 gr (2,200 fps) | 29.0 gr | 2,650 fps | 24″ | Bolt Action (62k PSI) | Hornady |
Understanding 6mm ARC Load Data & Pressure Tiers
Executing effective 6mm ARC load development requires identifying the specific action type and understanding published parameter definitions.
- Platform Pressure Tiers: SAAMI specifies two distinct pressure boundaries for the 6mm ARC. Gas-operated platforms (AR-15) are limited to 52,000 PSI to prevent excessive bolt face thrust and extractor wear.Bolt-action rifles can safely operate up to 62,000 PSI, allowing higher powder charges and increased velocities.
- Starting Load: The baseline charge recommended to initiate testing, typically set 10% lower than the maximum charge. It provides a safe threshold to evaluate primer condition and gas system cycling.
- Maximum Published Load:The highest tested charge that maintains internal chamber pressures within the platform’s respective SAAMI limit (52,000 PSI for gas guns or 62,000 PSI for bolt guns).
- Velocity: Measured in feet per second (fps), representing the projectile speed registered near the muzzle using standardized testing barrels (typically 24 inches).
- Cartridge Overall Length (C.O.A.L.):For gas-gun applications, maximum overall length is strictly constrained to 2.260 inches to ensure proper magazine fit and cycling. Bolt-action shooters may seat bullets longer depending on chamber throat geometry.
6mm ARC Bullet Weight Load Data
Published 6mm ARC reloading data categorizes projectiles into distinct weight tiers designed for varmints, medium game, and long-range competition.
55–70 Grain Bullet Class
- Available Data:Sourced from Sierra and Hodgdon for options like the 55 gr BlitzKing and 60 gr HP.
- Typical Designs: Flat-base or light boat-tail hollow-point and polymer-tipped varmint bullets.
- Velocity Range:Muzzle speeds range from 3,200 fps to over 3,450 fps in 24-inch barrels.
- Application: High-velocity, flat-trajectory varmint and predator hunting where rapid bullet fragmentation is desired.
80–90 Grain Bullet Class
- Available Data:Covered by Sierra and Hodgdon using bullets such as the 80 gr Sierra SBT and 90 gr Sierra TGK.
- Typical Designs:Soft-point, tipped hunting, or medium-weight match projectiles.
- Velocity Range:Maximum published charges yield velocities between 2,750 fps and 2,900 fps.
- Application: Dual-purpose performance for deer, pronghorn, and medium-range target shooting.
100–108 Grain Bullet Class
- Available Data:Extensively tested by Hornady and Hodgdon for long-range match options like the 103 gr ELD-X, 105 gr BTHP, and 108 gr ELD Match.
- Typical Designs:Very Low Drag (VLD) and aerodynamic boat-tail match projectiles featuring high ballistic coefficients (G1 BCs exceeding .500).
- Velocity Range: Published gas-gun max loads produce 2,600 fps to 2,750 fps from a 24-inch test barrel.
- Application:PRS/NRL competition and extended-range hunting, maintaining supersonic flight past 1,000 yards.
110–120 Grain Bullet Class
- Available Data:Published primarily by Hornady for specialty long-range and bolt-action setups (e.g., 109 gr ELD-M, 110 gr A-Tip, and 120 gr A-Tip).
- Typical Designs: Ultra-heavy match projectiles requiring fast barrel twist rates (1:7.5″ or 1:7″) for aerodynamic stability.
- Velocity Range: Gas-gun velocities range from 2,500 fps to 2,600 fps, while bolt-action data at 62,000 PSI pushes 120 gr projectiles up to 2,650 fps.
- Application: Extreme long-range target applications maximizing wind resistance and kinetic energy retention.
6mm ARC Powder Load Data
The combustion dynamics of the 6mm ARC benefit from medium-burn-rate rifle powders. Spherical powders like Hodgdon CFE 223 and LEVEREVOLUTION deliver top velocities due to high loading density, while extruded options like Varget, Benchmark, and IMR 8208 XBR offer thermal stability.
| Powder | Bullet | Bullet Weight | Published Load Range | Published Velocity | Platform Limit | Source |
| Benchmark | Sierra BK | 55 gr | 24.2 gr – 26.0 gr | 3,200 – 3,350 fps | 52,000 PSI | Sierra |
| TAC | Sierra BK | 55 gr | 28.6 gr – 31.8 gr | 3,200 – 3,453 fps | 52,000 PSI | Sierra |
| H335 | Sierra SBT | 80 gr | 26.0 gr – 27.2 gr | 2,700 – 2,850 fps | 52,000 PSI | Sierra |
| Benchmark | Sierra SBT | 80 gr | 24.2 gr – 26.0 gr | 2,700 – 2,850 fps | 52,000 PSI | Sierra |
| 8208 XBR | Sierra TGK | 90 gr | 24.7 gr – 26.0 gr | 2,600 – 2,750 fps | 52,000 PSI | Sierra |
| CFE 223 | Sierra TGK | 90 gr | 26.5 gr – 29.5 gr | 2,600 – 2,850 fps | 52,000 PSI | Sierra |
| CFE 223 | Hornady ELD-X | 103 gr | 26.0 gr – 28.9 gr | 2,465 – 2,727 fps | 52,000 PSI | Hodgdon |
| LEVEREVOLUTION | Hornady ELD-X | 103 gr | 25.5 gr – 28.5 gr | 2,450 – 2,750 fps | 52,000 PSI | Hodgdon |
| LEVEREVOLUTION | Hornady ELD-M | 108 gr | 25.0 gr – 28.2 gr | 2,400 – 2,710 fps | 52,000 PSI | Hodgdon |
| Varget | Hornady ELD-M | 108 gr | 23.5 gr – 26.2 gr | 2,350 – 2,580 fps | 52,000 PSI | Hodgdon |
| LEVEREVOLUTION | Hornady A-Tip | 120 gr | 24.5 gr – 28.5 gr | 2,200 – 2,650 fps | 62,000 PSI | Hornady |
Note: Powder charges established for one projectile cannot be substituted directly for another projectile without verifying published data for that specific bullet.
6mm ARC Bullet and Powder Combinations
Every variable in a 6mm ARC load recipe directly impacts chamber pressure, powder combustion, and bullet flight stability.
- Bearing Surface: Heavy match projectiles with long bearing surfaces create increased rifling friction compared to lighter varmint bullets, elevating peak pressure earlier in the ignition cycle.
- Seating Depth & Usable Volume: To maintain the 2.260″ maximum C.O.A.L. for AR-15 magazines, long 103–108 gr bullets must be seated deep into the case. This reduces internal powder capacity, causing compressed powder charges and accelerating pressure rises.
- Case Volume Differences:Hornady and Starline brass differ slightly in wall thickness and internal H2O capacity. Switching brass brands requires reducing powder charges by 1.0 grain and re-working up to observe pressure limits.
- Primer Selection:Small rifle primers (such as Federal 205 or CCI 450) differ in cup thickness and brisance. Magnum small rifle primers burn hotter to ignite ball powders like CFE 223 but can increase peak pressure.
- Gas System vs. Bolt Mechanism: Gas ports bleeding off pressure in AR-15s affect cycle timing and brass extraction. Bolt guns lock up completely, handling higher 62,000 PSI limits without extraction shearing.
6mm ARC Velocity from Published Data
Evaluating 6mm ARC powder charges requires distinguishing laboratory velocity figures from real-world field measurements.
| Bullet Weight | Bullet Profile | Powder | Published Max Load | Muzzle Velocity | Pressure Tier | Test Barrel | Source |
| 55 gr | Sierra BK | TAC | 31.8 gr | 3,453 fps | 52,000 PSI | 24″ | Sierra |
| 80 gr | Sierra SBT | H335 | 27.2 gr | 2,850 fps | 52,000 PSI | 24″ | Sierra |
| 90 gr | Sierra TGK | CFE 223 | 29.5 gr | 2,850 fps | 52,000 PSI | 24″ | Sierra |
| 103 gr | Hornady ELD-X | LEVEREVOLUTION | 28.5 gr | 2,750 fps | 52,000 PSI | 24″ | Hodgdon |
| 108 gr | Hornady ELD-M | CFE 223 | 28.5 gr | 2,700 fps | 52,000 PSI | 24″ | Hodgdon |
| 108 gr | Hornady ELD-M | Varget | 26.2 gr | 2,580 fps | 52,000 PSI | 24″ | Hodgdon |
| 120 gr | Hornady A-Tip | LEVEREVOLUTION | 28.5 gr | 2,650 fps | 62,000 PSI | 24″ | Hornady |
Manufacturer-published velocities represent empirical testing performed in universal receivers with tight-tolerance test barrels. Independent field testing using commercial rifles and optical or Doppler chronographs frequently yields slightly lower speeds due to looser factory chamber tolerances and production barrel variations. Ballistic calculator software estimates should be treated as theoretical guidelines, not physical velocity readings.
6mm ARC Velocity by Barrel Length
Standard 6mm ARC reloading data Hodgdon and 6mm ARC load data Hornady listings are measured using 24-inch test barrels. In field applications—especially short AR-15 builds—muzzle velocity drops as barrel length decreases.
- 24-Inch Barrels: Baseline for published manufacturer tables. Achieves maximum burn efficiency and velocity.
- 22-Inch Barrels: Expect a loss of approximately 35–50 fps compared to 24-inch published data.
- 20-Inch Barrels: Typical loss of 70–100 fps below 24-inch baseline metrics.
- 18-Inch Barrels: Average velocity drop of 120–150 fps below published maximums.
- 16-Inch Barrels: Exhibits a reduction of 180–220 fps compared to 24-inch test data (e.g., 108 gr factory loads typically measure ~2,550–2,580 fps out of a 16″ barrel).
Reloaders should never exceed published maximum charges to make up for velocity lost in shorter barrels.
Manufacturer Data vs. Independent Field Testing
A structured hierarchy exists when evaluating reloading resources for safety and performance:
- Pressure-Tested Manufacturer Data: Sources like Hornady, Hodgdon, and Sierra utilize piezo-electric strain sensors in standardized barrels to measure exact PSI limits. This is the most authoritative and safe reference point.
- Independent Chronograph Field Testing: Velocity data recorded via Doppler radar (e.g., Garmin, LabRadar) in production firearms provides realistic velocity expectations. However, chronographs record speed, not internal chamber pressure.
- User-Submitted Load Reports & Online Forums: Informal reports lack laboratory-grade pressure equipment and contain undocumented rifle variations. These should never be relied upon as primary load development benchmarks.
6mm ARC Pressure and Safety Guidelines
Adhering to safe reloading protocols ensures rifle reliability and protects shooters from catastrophic pressure spikes.
- Respect Platform Limits:Never load gas-gun AR-15 ammunition to 62,000 PSI bolt-action specifications. Sheared bolt lugs, bent extractors, and primer punctures can occur.
- Start Low and Work Up: Always begin at the starting charge listed in official manuals. Increase powder in 0.2-grain steps while inspecting fired cases for pressure indicators.
- Identify Pressure Signs: Stop firing immediately if brass exhibits flattened primers, ejector mark stamping on the case head, stiff bolt operation, or loose primer pockets.
- Monitor Seating Depth: In AR-15 magazines, seating bullets deeper than published C.O.A.L. specifications (2.260″) drastically reduces powder space, causing dangerous internal pressure jumps.
- Account for Temperature Shifts:Double-base ball powders like CFE 223 can exhibit temperature sensitivity. A load developed at 50°F may reach dangerous pressures when fired in 90°F+ summer heat.
Best Sources for 6mm ARC Load Data
- Hornady Manufacturing:Creator of the 6mm ARC cartridge. Provides the most thorough data for ELD Match, ELD-X, and A-Tip projectiles across both 52,000 PSI gas gun and 62,000 PSI bolt action categories.
- Hodgdon Reloading Data Center:Excellent free digital resource detailing pressure-tested recipes with exact PSI pressure outputs for CFE 223, LEVEREVOLUTION, Varget, and StaBALL Match.
- Sierra Bullets: Offers verified gas-gun load data covering lightweight varmint projectiles through heavy match bullets.
Common 6mm ARC Load Data Questions
Where can I find official 6mm ARC load data?
Official pressure-tested data is available on the Hodgdon Reloading Data Center, the Hornady Reloading App, and published reloading manuals from Sierra and Vihtavuori.
What powders perform best in the 6mm ARC?
Popular propellants with published data include Hodgdon CFE 223, LEVEREVOLUTION, Varget, IMR 8208 XBR, Winchester StaBALL Match, and Shooter’s World Tactical Rifle.
What is the maximum pressure for 6mm ARC?
SAAMI sets the Maximum Average Pressure (MAP) at 52,000 PSI for gas-operated AR-15 rifles and 62,000 PSI for bolt-action rifles.
Can I use bolt-action 6mm ARC load data in an AR-15?
No.Bolt-action data is worked up to 62,000 PSI, which exceeds the safe pressure boundary for AR-15 bolt lugs and gas systems.
What bullet weights are used in 6mm ARC reloading?
Published data spans bullet weights from 55-grain light varmint options up to 120-grain heavy match projectiles.
Why does 6mm ARC reloading data differ between Hodgdon and Hornady?
Data varies due to differences in test barrels, primer selection, brass volume, laboratory ambient conditions, and whether the test was tuned for 52,000 PSI gas guns or 62,000 PSI bolt guns.
How much velocity is lost in a 16-inch 6mm ARC barrel?
Expect a velocity loss of approximately 180 to 220 fps compared to the 24-inch laboratory test barrels used in published load tables.
What is the overall length (C.O.A.L.) for 6mm ARC in an AR-15?
The maximum Cartridge Overall Length for AR-15 magazine compatibility is 2.260 inches.
Final Verdict
Safe and effective 6mm ARC reloading begins by identifying your rifle platform’s pressure tier—52,000 PSI for AR-15 gas guns or 62,000 PSI for bolt-action rifles. Always pull 6mm ARC reload data directly from pressure-tested manufacturer databases like Hornady, Hodgdon, or Sierra. Handloaders must strictly follow the exact bullet weight, profile, powder, primer, and C.O.A.L. specifications published by the testing laboratory.Begin load development at the published starting load and increase charges in small increments, cross-referencing field chronograph results against official pressure guidelines.