Reliable 8.6 Blackout reloading data can be found through official manufacturers like Gorilla Ammunition and technical publications like Handloader Magazine, as major powder companies are still developing their manuals for this newly SAAMI-standardized cartridge. Published data normally includes the specific bullet, bullet weight, powder type, starting powder charge, maximum powder charge, muzzle velocity, and the barrel length of the test firearm. Available data currently represents lightweight supersonic projectiles from 160 grain up to 210 grain, as well as heavy subsonic bullets ranging from 285 grain up to 342 grain. Reputable powder manufacturers like Hodgdon, Accurate, and Vihtavuori produce the powders featured in published 8.6 Blackout load data, though shooters must rely on bullet-maker or boutique ammo-maker data for exact charge weights. Results will always vary by bullet, powder, brass case volume, primer, barrel length, and firearm configuration due to the unique pressure curves generated by the 8.6 Blackout’s incredibly fast barrel twist rates.
8.6 Blackout Reloading Data
| Bullet | Bullet Weight | Powder | Published Starting Load | Published Maximum Load | Published Velocity | Barrel Length / Firearm | Source |
| Gorilla Punisher Expanding | 342 grain | H110 | Not Specified | 16.5 gr | 985 fps | 12 inch Barrel | Gorilla Ammunition |
| Gorilla Punisher Expanding | 342 grain | Accurate #9 | Not Specified | 16.2 gr | 1025 fps | 12 inch Barrel | Gorilla Ammunition |
| Gorilla Punisher Expanding | 342 grain | Lil’Gun | Not Specified | 13.4 gr | 1000 fps | 12 inch Barrel | Gorilla Ammunition |
| Northern Precision Bonded | 225 grain | Accurate 1680 | 15.0 gr | 17.0 gr | 1089 fps to 1208 fps | AR-10 Platform | Handloader Magazine |
| Northern Precision Bonded | 225 grain | Hodgdon CFE BLK | 15.5 gr | 17.5 gr | 1058 fps to 1259 fps | AR-10 Platform | Handloader Magazine |
| Northern Precision Bonded | 225 grain | Ramshot TAC | 17.5 gr | 18.5 gr | 1032 fps to 1070 fps | AR-10 Platform | Handloader Magazine |
| Hornady ELD Match | 285 grain | IMR-4227 | 15.0 gr | Not Specified | 1050 fps | AR-10 Platform | Handloader Magazine |
| Hornady ELD Match | 285 grain | Hodgdon H110 | Not Specified | 15.0 gr | 1150 fps | AR-10 Platform | Handloader Magazine |
| Barnes TTSX | 160 grain | Factory Equivalent | Not Specified | Not Specified | 2400 fps | 16 inch Barrel | Faxon Firearms / NRA |
| Barnes TSX | 210 grain | Factory Equivalent | Not Specified | Not Specified | 1970 fps to 2116 fps | 16 inch Rem 700 / 12 inch | Ammo.com / NRA |
Understanding The 8.6 Blackout Reloading Data
When analyzing any 8.6 Blackout load data chart, it is vital to understand exactly what each metric represents to maintain safety and accuracy.
- Starting load: This is the minimum powder charge recommended by the publisher to safely cycle the firearm and prevent squib loads.
- Maximum published load: This is the absolute ceiling for powder charge tested by the manufacturer that stays within safe pressure limits.
- Velocity: Measured in feet per second (fps), this indicates how fast the bullet travels when leaving the muzzle.
- Pressure: The internal chamber pressure generated upon firing. SAAMI standardized the 8.6 Blackout in 2026 with a Maximum Average Pressure (MAP) of 62,000 psi.
- Bullet weight: The mass of the projectile measured in grains.
- Powder: The specific chemical propellant used. 8.6 Blackout powder types are typically fast-burning magnum pistol or 300 Blackout rifle powders.
- Barrel length: The length of the barrel used during testing.
- Firearm used for testing: Whether the test was conducted with a universal receiver, a bolt-action rifle, or an AR-10 platform.
- Test conditions: Altitude, temperature, and atmospheric pressure at the time of testing.
- Cartridge overall length (COAL): The total length of the loaded round. Gorilla Ammunition lists their 342-grain load at a COAL of 2.77 inches.
Different published sources may produce different results because slight variations in brass case capacity, primer ignition temperature, and atmospheric conditions directly affect the burn rate of the powder. A 12-inch barrel will also yield different velocities than a 16-inch barrel using the exact same 8.6 Blackout powder charge.
8.6 Blackout Bullet Weight Reloading Data
The 8.6 Blackout cartridge supports a uniquely wide range of projectile weights. It bridges the gap between lightweight supersonic hunting bullets and massive subsonic monolithic projectiles.
- 160 grain:Faxon Firearms published test data for the 160-grain Barnes TTSX bullet.This is a supersonic application capable of reaching 2,400 fps out of a 16-inch barrel. It is intended for medium-game hunting where a flatter trajectory is desired.
- 180 grain: While some 180-grain projectiles exist for .338 caliber rifles, dedicated 8.6 Blackout reloading data for this weight remains scarce as shooters generally prefer lighter 160-grain or heavier 210-grain options for supersonic flight.
- 200 grain:SAAMI selected the 200-grain projectile as the reference load during their 2026 standardization of the 8.6 Blackout cartridge.
- 210 grain: The 210-grain Barnes TSX is a popular supersonic choice. Ammunition manufacturers list this bullet traveling between 1,970 fps and 2,116 fps. It is primarily designed for hunting deer and feral hogs.
- 220 grain: This weight is heavily associated with the 300 Blackout. There is virtually no authoritative published 8.6 Blackout load data for 220-grain bullets.
- 250 grain: Considered a transition weight, 250-grain bullets are occasionally used for load development, but authoritative publishers focus heavily on 285-grain and above for subsonic work.
- 285 grain: This is the baseline heavy subsonic weight. Bullets like the Hornady ELD Match and Discreet Ballistics machined projectiles hover around 1,050 fps. They feature exceptionally high ballistic coefficients and are intended for suppressed tactical use and short-range hunting.
- 300 grain: The 300-grain Sierra MatchKing HPBT is highly popular among the handloading community. Independent data logs show velocities around 1,044 fps to 1,115 fps when utilizing powders like N320 and CFE BLK.
- 342 grain and 350 grain:Gorilla Ammunition officially published data for their 342-grain Punisher expanding bullet.It is strictly a subsonic application designed to stay below 1,025 fps, offering massive kinetic energy transfer for close-range hunting.
8.6 Blackout Powder Reloading Data
| Powder | Bullet | Bullet Weight | Published Starting Load | Published Maximum Load | Published Velocity | Source |
| H110 | Gorilla Punisher | 342 grain | Not Specified | 16.5 gr | 985 fps | Gorilla Ammunition |
| Accurate #9 | Gorilla Punisher | 342 grain | Not Specified | 16.2 gr | 1025 fps | Gorilla Ammunition |
| Lil’Gun | Gorilla Punisher | 342 grain | Not Specified | 13.4 gr | 1000 fps | Gorilla Ammunition |
| Accurate 1680 | Northern Precision | 225 grain | 15.0 gr | 17.0 gr | 1089 to 1208 fps | Handloader Magazine |
| Hodgdon CFE BLK | Northern Precision | 225 grain | 15.5 gr | 17.5 gr | 1058 to 1259 fps | Handloader Magazine |
| Ramshot TAC | Northern Precision | 225 grain | 17.5 gr | 18.5 gr | 1032 to 1070 fps | Handloader Magazine |
| IMR-4227 | Hornady ELD Match | 285 grain | 15.0 gr | Not Specified | 1050 fps | Handloader Magazine |
| Hodgdon H110 | Hornady ELD Match | 285 grain | Not Specified | 15.0 gr | 1150 fps | Handloader Magazine |
8.6 Blackout Bullet And Powder Combinations
Exact component combinations matter immensely when engaging in 8.6 Blackout reloading. Changing just one variable can dangerously spike chamber pressure.
Bullet construction dictates how much resistance the projectile meets in the bore. A solid copper monolithic bullet has a different bearing surface than a lead-core jacketed bullet. Seating depth directly influences cartridge overall length. Pushing a bullet deeper into the brass reduces internal case capacity, which significantly increases pressure.
Other vital components include the primer and the brass itself. Different brands of brass have varying wall thicknesses resulting in different internal volumes. Furthermore, powder burn rates vary slightly between manufacturing lots. A crimp applied too heavily can also raise pressure by holding the bullet too tightly during powder ignition. The barrel length and firearm configuration dictate how much of the powder burns before the bullet exits the muzzle. It is mandatory that published reloading data is applied only to the specific tested components and environmental conditions outlined by the publisher.
8.6 Blackout Velocity From Published Data
Comparing published 8.6 Blackout velocity reveals exactly how versatile the cartridge is across different barrel lengths and weights.
- Gorilla Punisher 342gr:Utilizing 16.5 grains of H110 yields a manufacturer-published muzzle velocity of 985 fps from a 12-inch barrel.
- Northern Precision 225gr: Utilizing 17.0 grains of Accurate 1680 yields an independent chronograph testing velocity of 1,208 fps.
- Hornady ELD Match 285gr: Utilizing 15.0 grains of IMR-4227 yields an independent chronograph testing velocity of 1,050 fps.
- Barnes TTSX 160gr:Utilizing factory-equivalent loads yields a manufacturer-published muzzle velocity of 2,400 fps out of a 16-inch barrel.
It is important to clearly distinguish manufacturer-published velocity derived from controlled laboratory environments from independent chronograph testing done in the field. Ballistic calculator estimates should never be presented as measured velocity.
8.6 Blackout Reloading Data By Barrel Length
Barrel length heavily affects published 8.6 Blackout velocity, especially for supersonic loads. The cartridge was optimized for complete powder burn in short barrels.
Testing conducted by Faxon Firearms highlights how barrel length alters performance. A 16-inch barrel is ideal for maximizing supersonic velocities, pushing lightweight 160-grain projectiles up to 2,400 fps. Conversely, a 12-inch barrel is widely considered the optimal length for 8.6 Blackout subsonic load data. With heavy 342-grain bullets, a 12-inch barrel easily achieves the target 1,000 fps velocity while providing excellent maneuverability for a suppressed AR-10 platform. Very short 8-inch barrels are also viable for extreme close-quarters subsonic applications but will yield lower velocities overall.
8.6 Blackout Subsonic vs Supersonic Data
The fundamental difference between published subsonic and supersonic 8.6 Blackout data lies in the target velocity and bullet weight.
Subsonic 8.6 Blackout supersonic load data involves keeping the bullet speed below the speed of sound (approximately 1,125 fps at sea level).This is achieved using heavy bullets ranging from 285 grains to over 340 grains.These loads produce around 670 to 700 foot-pounds of muzzle energy and are intended for stealthy, suppressed hunting or tactical applications out to 150 yards.
Supersonic 8.6 Blackout load data pushes lighter bullets (160 grain to 210 grain) well past the sound barrier. A 190-grain fracturing bullet traveling at 2,400 fps delivers upwards of 2,430 foot-pounds of energy. This mirrors the performance of traditional medium-game hunting cartridges and extends the effective range out to 300 yards. Data for one class cannot be safely transferred to the other.
8.6 Blackout Energy And Ballistics
Reliable source data shows stark differences in energy based on the load.
For supersonic loads, the 210-grain Barnes TSX traveling at a muzzle velocity of 1,970 fps produces a staggering muzzle energy of roughly 1,810 foot-pounds.The lighter 160-grain bullet traveling at 2,400 fps delivers around 2,045 foot-pounds. Downrange velocity and downrange energy drop rapidly past 300 yards due to the steep trajectory of the cartridge.
For subsonic loads, a 285-grain bullet moving at 1,050 fps generates about 698 foot-pounds of muzzle energy. However, the cartridge relies on high ballistic coefficients and aggressive rotational energy derived from a 1:3 barrel twist rate to maximize tissue damage on impact rather than relying strictly on kinetic energy transfer.
Manufacturer Data vs Independent Testing
Manufacturer-published reloading data is derived from highly controlled laboratory environments using universal pressure barrels and precise piezoelectric pressure sensors. This data is the safest benchmark for load development.
Independent chronograph testing occurs when knowledgeable reloaders or shooting magazines test handloads in the field. While useful, these independent measurements may differ from published figures due to variations in altitude, temperature, barrel wear, and specific firearm tolerances.
User-submitted load reports found on forums and community databases lack pressure-testing equipment. Shooters should give absolute priority to official, pressure-tested manufacturer data to prevent catastrophic firearm failures.
8.6 Blackout Pressure And Safety
Following published 8.6 Blackout reloading data exactly is paramount for safety. SAAMI standardization dictates a Maximum Average Pressure of 62,000 psi for the 8.6 Blackout cartridge.
Always begin with the published starting load. Never jump straight to the maximum load. Component substitutions are dangerous. Swapping a standard large rifle primer for a magnum primer can dangerously elevate chamber pressure. Likewise, using a different brand of brass with thicker walls reduces case capacity and spikes pressure. Altering the bullet seating depth to make a shorter cartridge overall length will also drastically increase the internal pressure curve. Environmental factors like hot summer temperatures can cause a safe maximum load to become an over-pressure hazard. Always adhere strictly to firearm manufacturer specifications and never attempt to develop an unpublished recipe.
Best Sources For 8.6 Blackout Reloading Data
The strongest current sources for 8.6 Blackout reloading data are highly specialized due to the relative novelty of the cartridge.
Gorilla Ammunition stands out for authority and transparency, providing specific PDF load data for their heavy subsonic projectiles featuring exact powder charges and velocity measurements. Handloader Magazine provides excellent, independently tested component specificity for a variety of powders including Accurate 1680 and CFE BLK. Faxon Firearms remains a top source for authoritative barrel length and velocity relationships.
As the cartridge matures post-SAAMI standardization, major manuals are expected to update. However, current shooters must carefully distinguish official manufacturer guidelines from secondary community databases.
FAQs
Where can I find 8.6 Blackout reloading data?
Authoritative 8.6 Blackout reload data is currently published by boutique ammunition manufacturers like Gorilla Ammunition, barrel makers like Faxon Firearms, and technical shooting publications like Handloader Magazine.
What powders have published 8.6 Blackout data?
Published 8.6 Blackout powder profiles include Hodgdon H110, Hodgdon CFE BLK, Accurate #9, Accurate 1680, Ramshot TAC, IMR-4227, and Lil’Gun.
What bullet weights have 8.6 Blackout reloading data?
Published data currently supports lightweight supersonic bullets from 160 grain to 210 grain, and heavy subsonic bullets ranging from 285 grain up to 350 grain.
Does Hodgdon publish 8.6 Blackout data?
As of late 2026, Hodgdon 8.6 Blackout load data Hodgdon specific tables are not yet prominently featured in their primary web data center, though their powders are heavily utilized in independent and boutique manufacturer testing.
Does Hornady publish 8.6 Blackout data?
While Hornady contributed to the early development of the cartridge and their 285-grain ELD Match bullets are highly popular, official 8.6 Blackout load data Hornady manuals have not yet been fully released for all weights.
Does Nosler publish 8.6 Blackout data?
Nosler manufactures premium 8.6 Blackout brass, but specific 8.6 Blackout load data Nosler bullet recipes are not yet available in their primary load data center.
What is the difference between starting and maximum 8.6 Blackout data?
The starting load is the lowest safe powder charge recommended to cycle the weapon, while the maximum load is the highest tested powder charge that remains within safe SAAMI pressure limits.
Does barrel length affect 8.6 Blackout velocity?
Yes. A 16-inch barrel will yield much higher supersonic velocities than an 8-inch barrel, though subsonic velocities are generally optimized around a 12-inch barrel to ensure complete powder burn.
Why does 8.6 Blackout data vary between sources?
Data varies because different publishers use different test platforms, barrel lengths, brass case volumes, atmospheric conditions, and primer types, all of which alter the final velocity and pressure.
Where can I find pressure-tested 8.6 Blackout data?
Pressure-tested data is found directly through SAAMI specifications, ammunition manufacturers like Gorilla Ammunition, and verified engineering tests published by barrel manufacturers.