Finding the best powder for .300 Blackout requires analyzing reputable load data, with Hodgdon CFE BLK, Accurate 1680, and Hodgdon H110 establishing themselves as the three ultimate choices. Hodgdon CFE BLK provides the exact gas volume needed to reliably cycle heavy subsonic loads in gas guns. Accurate 1680 remains the most proven powder for consistent subsonic accuracy and reliability. Hodgdon H110 delivers the absolute maximum safe velocities for lightweight supersonic hunting bullets.
Best Powder For .300 Blackout
| Powder | Published Bullet Weights | Published Velocity | Published Load Data Available | Key Strength | Best Use | Source | Check |
| Hodgdon CFE BLK | 110gr to 220gr | 1000 to 2250+ fps | Yes | Perfect gas port pressure | Subsonic AR-15 cycling | Hodgdon Reloading Data Center | Check |
| Accurate 1680 | 110gr to 220gr | 1000 to 2200+ fps | Yes | Extreme reliability | Heavy subsonics | Western Powders Data | Check |
| Hodgdon H110 | 110gr to 220gr | 1000 to 2400+ fps | Yes | Maximum velocity | Lightweight supers | Hodgdon Reloading Data Center | Check |
| Hodgdon Lil’Gun | 110gr to 220gr | 1000 to 2350+ fps | Yes | Low pressure velocity | Supersonic hunting | Hodgdon Reloading Data Center | Check |
| IMR 4227 | 110gr to 220gr | 1000 to 2150+ fps | Yes | Quiet sound signature | Suppressed bolt guns | Hodgdon Reloading Data Center | Check |
| Vihtavuori N120 | 110gr to 220gr | 1000 to 2200+ fps | Yes | Clean burning consistency | Premium target loads | Vihtavuori Reloading Data | Check |
| Accurate No. 9 | 110gr to 220gr | 1000 to 2200+ fps | Yes | Excellent case fill | Short barrel supers | Western Powders Data | Check |
| Vihtavuori N110 | 110gr to 150gr | 1700 to 2350+ fps | Yes | Ultra clean ignition | Fast target loads | Vihtavuori Reloading Data | Check |
| Accurate 5744 | 110gr to 220gr | 1000 to 2100+ fps | Yes | Forgiving pressure curve | Cast lead subsonics | Western Powders Data | Check |
| Winchester 296 | 110gr to 220gr | 1000 to 2400+ fps | Yes | Identical to H110 | High velocity supers | Hodgdon Reloading Data Center | Check |
Hodgdon CFE BLK
Pros: Engineered specifically for this cartridge, it generates excellent gas volume to reliably cycle short barrel rifles and features a copper fouling eraser.
Cons: It can leave behind heavy carbon fouling and unburnt powder if loaded at very low subsonic pressures.
Published .300 Blackout Data: Extensively documented in the Hodgdon Reloading Data Center.
Common Bullet Weights: Highly effective with 190 grain, 208 grain, 212 grain, and 220 grain heavy bullets.
Velocity Characteristics: Easily keeps heavy bullets hovering right around the 1,000 fps to 1,050 fps subsonic sweet spot.
Accuracy or Consistency Evidence: Known for delivering solid accuracy, though standard deviations can widen in extremely cold weather.
Best Application: The definitive choice for the best powder for .300 blackout subsonic loads fired from an AR-15 platform.
Limitations: Not the most efficient choice for pushing lightweight 110 grain bullets to maximum supersonic speeds.
Accurate 1680
Pros: Accurate 1680 meters perfectly, fills the case nicely, and provides the necessary back pressure to lock bolts to the rear on the last shot.
Cons: It is notorious for being one of the loudest powders when shot suppressed.
Published .300 Blackout Data: Thoroughly covered by Western Powders and most modern reloading manuals.
Common Bullet Weights: Optimized specifically for 200 grain, 208 grain, and 220 grain subsonic projectiles.
Velocity Characteristics: Safely pushes heavy bullets to 1,050 fps with very predictable velocity steps per grain of powder added.
Accuracy or Consistency Evidence: Frequently cited by reloaders as having some of the lowest extreme spreads and best accuracy for heavy bullets.
Best Application: The absolute standard for subsonic reliability in semi automatic rifles.
Limitations: The loud report makes it slightly less desirable for shooters chasing Hollywood quiet suppressed setups.
Hodgdon H110
Pros: H110 produces incredible power and routinely achieves the absolute highest published velocities for the cartridge.
Cons: It is heavily discouraged to load it below published starting charges as it can cause dangerous pressure spikes or erratic ignition.
Published .300 Blackout Data: Readily available from the Hodgdon Reloading Data Center and Hornady.
Common Bullet Weights: Primarily focused on lightweight 110 grain, 125 grain, and 150 grain bullet designs.
Velocity Characteristics: Consistently pushes 110 grain bullets to nearly 2,400 fps out of a 16 inch barrel.
Accuracy or Consistency Evidence: A long time favorite for producing highly accurate, flat trajectory hunting rounds.
Best Application: A highly reliable choice for outdoor enthusiasts needing full power .300 Blackout hunting rounds.
Limitations: It often struggles to reliably cycle heavy subsonic bullets without extensive gas system tuning.
Hodgdon Lil’Gun
Pros: Provides massive velocities for supersonic bullets while generating noticeably less chamber pressure than H110.
Cons: It is known to burn very hot, which can heat up barrels rapidly during high volume fire.
Published .300 Blackout Data: Extensively tested with dozens of loads published by Hodgdon and Speer.
Common Bullet Weights: Broadly supports everything from 110 grain up to heavy 220 grain projectiles.
Velocity Characteristics: Delivers strong upper range velocities that perfectly mimic factory defensive ammunition.
Accuracy or Consistency Evidence: Renowned for exceptional consistency and very tight groups with mid weight 150 grain hunting bullets.
Best Application: Widely considered the best powder for .300 blackout supersonic hunting loads in bolt action rifles.
Limitations: The high burn temperature makes it less ideal for rapid fire range sessions.
IMR 4227
Pros: IMR 4227 is a very stable single base powder that is widely celebrated for producing the quietest sound signature through a suppressor.
Cons: It does not produce enough gas volume to reliably cycle many standard AR-15 configurations.
Published .300 Blackout Data: Available in the Hodgdon Reloading Data Center and Speer manuals.
Common Bullet Weights: Best utilized with heavy 190 grain, 208 grain, and 220 grain jacketed or cast bullets.
Velocity Characteristics: Safely keeps heavy bullets comfortably below the speed of sound.
Accuracy or Consistency Evidence: Extremely stable powder that delivers fantastic accuracy for short range target work.
Best Application: Perfect for loading ultra quiet subsonic ammunition for manual action firearms like bolt action rifles and single shots.
Limitations: Cannot reach the extreme supersonic velocities of H110 or Lil’Gun.
Vihtavuori N120
Pros: Features an ultra clean burning profile that drastically reduces carbon fouling inside the rifle and the suppressor.
Cons: The extruded grains do not always meter as smoothly as spherical ball powders in automated drops.
Published .300 Blackout Data: Heavily documented in the official Vihtavuori Reloading Guide.
Common Bullet Weights: Excellent for everything from 110 grain up to heavy 220 grain bullets.
Velocity Characteristics: Capable of perfectly stabilizing subsonic loads at 1,050 fps while also providing good supersonic speeds.
Accuracy or Consistency Evidence: Provides extremely consistent ignition resulting in benchrest quality groups.
Best Application: The ultimate choice for loading premium, match grade ammunition where cleanliness is a priority.
Limitations: It is generally more expensive and harder to source than domestic powders.
Accurate No. 9
Pros: A very dense spherical powder that provides excellent case fill and meters flawlessly through progressive presses.
Cons: Burns slightly faster than ideal for the heaviest 220 grain subsonics in long barrels.
Published .300 Blackout Data: Found extensively in Western Powders load data guides.
Common Bullet Weights: Supports the full range but truly shines with 110 grain to 150 grain bullets.
Velocity Characteristics: Capable of pushing 125 grain bullets to excellent velocities with safe pressure limits.
Accuracy or Consistency Evidence: Delivers great consistency for supersonic short barrel setups.
Best Application: An outstanding option for loading supersonic practice ammunition in high volume.
Limitations: Does not generate the required gas volume to cycle heavy subsonics in most AR-15 platforms.
Vihtavuori N110
Pros: An exceptionally fast burning rifle powder that yields incredibly clean burns and extracts maximum accuracy from light bullets.
Cons: The fast burn rate makes it completely unsuitable for loading heavy 220 grain subsonic ammunition.
Published .300 Blackout Data: Comprehensive data is published in the Vihtavuori Reloading Guide.
Common Bullet Weights: Strictly optimized for lightweight 110 grain, 125 grain, and 150 grain bullets.
Velocity Characteristics: Safely pushes light hunting bullets to very respectable supersonic speeds.
Accuracy or Consistency Evidence: Highly prized by target shooters for producing single digit standard deviations.
Best Application: The top choice for loading premium lightweight target loads in bolt action or single shot rifles.
Limitations: Will not reliably operate the gas system of an AR-15 when loaded with heavy subsonic bullets.
Accurate 5744
Pros: Accurate 5744 is a bulky powder that fills the case incredibly well and is almost entirely position insensitive.
Cons: It can leave behind a noticeable amount of unburnt powder granules in the barrel.
Published .300 Blackout Data: Available through Western Powders and the Speer manual.
Common Bullet Weights: Widely used with 150 grain to 220 grain cast lead and jacketed bullets.
Velocity Characteristics: Very safely drives heavy bullets at subsonic speeds without dangerous pressure spikes.
Accuracy or Consistency Evidence: Delivers very tight groups specifically with modern polymer coated cast bullets.
Best Application: Excellent for reloaders who cast their own heavy lead bullets for subsonic target practice.
Limitations: Leaves your rifle action dirtier than premium single base extruded powders.
Winchester 296
Pros: Winchester 296 is physically the exact same powder as Hodgdon H110, providing an alternative label when shelves are bare.
Cons: It shares the same exact limitations as H110 regarding subsonic cycling issues.
Published .300 Blackout Data: Extensively documented by the Hodgdon Reloading Data Center.
Common Bullet Weights: Safest when used with 110 grain, 125 grain, and 150 grain supersonic bullets.
Velocity Characteristics: Produces blistering supersonic velocities directly mirroring H110 load data.
Accuracy or Consistency Evidence: Delivers excellent accuracy for short to medium range hunting and paper punching.
Best Application: Perfect for high velocity hunting rounds designed for maximum kinetic energy transfer.
Limitations: Unsuitable for heavy 220 grain bullets if your goal is reliable semi automatic cycling.
How To Choose Between The 10 Powders
When viewing a comprehensive .300 Blackout powder comparison, your ideal choice depends entirely on whether you intend to shoot supersonic or subsonic ammunition. For heavy subsonic rounds shot through a suppressor, Hodgdon CFE BLK, Accurate 1680, and IMR 4227 are the absolute best choices on the market. If you are focused strictly on high velocity supersonic hunting loads, Hodgdon H110, Winchester 296, and Hodgdon Lil’Gun will serve you perfectly. For precision shooters wanting the cleanest burn possible in a bolt action rifle, premium options like Vihtavuori N120 and Vihtavuori N110 are the clear winners.
Published Data And Safety
Using exact .300 Blackout reloading data is mandatory for your safety and the longevity of your rifle. Every published reloading recipe is carefully calibrated for a specific bullet weight, bullet design, and seating depth. Swapping components like your primer from standard to magnum can significantly alter the internal pressure curve of the small cartridge case. Maintaining the exact cartridge overall length is paramount because seating a heavy .30 caliber bullet too deeply drastically spikes internal pressure. Always begin your process with the published starting load and slowly work up toward the maximum published load. Monitoring your brass for pressure signs and adhering strictly to your specific firearm specifications will prevent catastrophic failures. Relying solely on official data from powder manufacturers guarantees safe and reliable ammunition.
FAQs
What is the best powder for .300 Blackout?
The best powder for .300 Blackout depends on your specific application, but Hodgdon CFE BLK, Accurate 1680, and Hodgdon H110 are universally recommended based on published load data.
What are the 3 best powders for .300 Blackout?
The 3 best powders for .300 Blackout are Hodgdon CFE BLK, Accurate 1680, and Hodgdon H110.
What powder gives the best .300 Blackout velocity?
Hodgdon H110 and Winchester 296 will safely provide the absolute best velocity when shooting lightweight supersonic hunting bullets.
What powder is best for .300 Blackout subsonic loads?
Hodgdon CFE BLK and Accurate 1680 are the absolute best choices for safely loading heavy subsonic rounds that reliably cycle semi automatic rifles.
What powder is best for .300 Blackout supersonic loads?
Hodgdon H110, Hodgdon Lil’Gun, and Vihtavuori N110 are excellent choices for supersonic .300 Blackout loads due to their high velocities and accuracy.
Does powder choice affect .300 Blackout accuracy?
Yes, powder choice directly affects accuracy by changing the burn rate, the internal pressure curve, and the standard deviation of your velocity for a specific bullet weight.
What powders have published .300 Blackout load data?
Almost all fast burning rifle powders and slow burning magnum pistol powders have published data, including extensive options from Hodgdon, Alliant, Vihtavuori, Winchester, and Accurate.
Does Hodgdon publish .300 Blackout powder data?
Yes, Hodgdon publishes extensive, free .300 Blackout powder load data for their entire family of powders through their online Reloading Data Center.