The Best 300 Blackout Subsonic Ammunition: 14 Choices

The 300 Blackout subsonic revolutionized urban and residential shooting by delivering suppressed performance without excessive muzzle flash. Our recommended loads maintain reliable, accurate function in bolt-action rifles and semi-automatic platforms while significantly reducing noise and recoil. These carefully selected cartridges balance power, accuracy, and controlled expansion for both tactical and sporting applications.

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Reviews

Cordless 300 Blackout Subsonic Cellular Shade

These cordless cellular shades provide excellent light blockout and privacy with their triplecell construction. At a generous 48 inches long, they fit most standard windows, though slightly longer versions might be necessary for very wide windows. The 37.5-inch width means you can get six shades to cover a double window without issues. Cleaning is simple with a damp sponge, and mounting is straightforward with the included hidden brackets. Overall, these shades deliver on their promise of blackout performance while featuring smooth operation and clean lines.

Beyond Braid Fishing Line

For serious anglers, Beyond Braid offers both 4-strand and 8-strand braided options in vibrant camo and classic colors. The premium construction proves itself in multiple applications—sleek casts on spinning and bait-casting reels, and consistent performance in both fresh and saltwater environments. While opinions vary, many users praise its smooth handling, impressive toughness, and excellent value compared to competitors.

BlindsAvenue 30-in x 48-in 300 Blackout Subsonic Cellular Shade

These sleek black cellular shades combine stellar energy efficiency with elegant blackout capabilities. The 30-by-48-inch panels feature 9/16-inch honeycomb construction that traps air for year-round comfort, while their UV-blocking properties help keep your room dark and cool. The top-down/bottom-up design lets you adjust the shade’s position for privacy while maintaining an unobstructed view.

Caliber Coffee 300 Blackout

From Brazil’s premium coffee estates, this small-batch 100% Arabica roast combines dark chocolate and raspberry notes with anise undertones. Each cup features the subtle sweetness characteristic of Brazil’s natural processing methods, while the expertly crafted beans deliver a rich, complex flavor profile.

Rockrose 5% VLT Nano Ceramic Car Window Tint

This 40-inch by 20-foot roll of Rockrose tint film offers excellent UV protection with 99% rejection rates while maintaining a visible light transmission of just 5%. The 2-ply nano ceramic construction helps prevent color fading and interior damage from the sun’s rays, making it a practical choice for car owners concerned about both their vehicle’s longevity and their skin health.

300 Blackout Cellular Shade

These cordless shades cut out 99% of light for pitch-black privacy, with a white-backed surface that looks neat from the outside. The 1.5” cellular design blocks heat too, keeping your room at a comfortable temperature. Raising and lowering them is super simple - just grab the bottom rail and pull, no tricky cords to deal with.

Noble Shades 300 Blackout Cellular Shade

These motorized cellular shades combine elegant off-white aesthetics with practical functionality. The high-quality spun lace fabric blocks out 300% more light than standard shades while maintaining superior sound absorption. The included 15-channel remote operates smoothly with enough strength to raise and lower the 48-inch length with just the press of a button. The durable shade system runs on eight included alkaline batteries and features a sleek PVC headrail and bottom rail design with matching end caps, creating a clean look from top to bottom.

Dillon RL 550 300 Whisper Conversion Kit

This simple yet effective conversion kit lets you switch your trusted Dillon press between different calibers, making it a handy addition to any shooter’s toolkit. The included parts click smoothly into place, and the overall setup is impressively straightforward for something that lets you dial in precise loads. Whether you’re building subsonic 300 Blackout or standard 300 AAC ammo, this kit makes the process a breeze.

Ultimate 300 Blk Subsonic Die Pack

This 6-die set takes your 300 Blackout upper receiver to the next level, giving you precision resizing and consistent crowning every time you chamber a round. When you’re building or rebuilding, these CCP AAC dies make the process smoother and your results tighter. It’s the behind-the-scenes hero that helps your rifle perform at its best.

300 B/O Blackout Brass Case Trimmer

Crafted for precision work with 300 Blackout brass cases, this case trimmer mounts directly to your drill for steady, accurate cuts. The supported-case design eliminates the need for pilots while maintaining straight, clean edges. Whether you’re feeding cases by hand or using a tray system, this tool handles full-length cases with ease and leaves them ready for your priming session.

Forster Headspace Gage 300 Blackout Field Length Rimless

This precision instrument helps prevent potentially dangerous rifle chamber issues by measuring headspace with military-grade accuracy. The gage fits barrels and chambers to ensure they meet safety standards, with measurements precise to 0.00015”. It’s particularly useful for checking barrels and chambers to prevent excessive headspace that could compromise your firearm’s safety and performance.

Q Honey Badger BBL Assembly 300 Black 7

This 7-inch 300BLK barrel assembly bolts into the Honey Badger upper receiver, featuring a light profile, 1:5 twist rate, and 5/8x24 threads for detachable magazines. The 300 Blackout configuration handles high pressures well, with a reliable matte stainless finish that resists corrosion.

Solinco Blackout 300

With its 100-square-inch head and 27-inch length, the Solinco Blackout 300 delivers plenty of power while maintaining decent control. The 40T Carbon Fiber construction at 3/9 o’clock creates a larger sweetspot and makes off-center hits feel more solid. At just 11.1 ounces strung, it handles surprisingly well for a racquet with its level of heft. The Liquid Crystal Technology reduces vibrations while the interchangeable butt cap lets you tweak the weight and balance to your liking. Whether you’re an intermediate or advanced player looking for an all-court weapon, the Blackout 300 offers plenty ofvable features that set it apart from other racquets in its category.

These super-easy-to-use blackout blinds are designed to fit any window size and shape, with a massive 94” by 55” piece of blackout fabric that can cover two or three windows at once. The clever grid-patterned design makes precise cutting a breeze, while the self-adhesive hooks and loops create a strong seal without leaving any messy residue. Each set includes 16 suction cups, 25 hook tabs, and 32 loop tabs to secure the blind to any smooth surface, from glass windows to drywall walls. Perfect for both home and travel, these blackout blinds provide superior light blocking and temperature insulation, keeping rooms warm in winter and cool in summer with their light-weight polyester construction.

Buyer’s Guide

The 300 Blackout subsonic cartridge has become increasingly popular for tactical, law enforcement, and civilian use due to its versatility and performance. This cartridge allows for effective indoor training and rapid-reload capabilities while maintaining quiet operation when fired subsonically.

Legal Considerations

Before purchasing, familiarize yourself with local laws regarding handgun purchases, 300 Blackout handguns, and subsonic ammunition. Some jurisdictions have specific restrictions on subsonic firearm possession and use.

Handgun Considerations

When selecting a 300 Blackout handgun, consider the intended use and personal shooting mechanics. Full-size, compact, and subcompact options are available, each with different recoil and size characteristics.

Ammunition Options

The market offers various subsonic loads optimized for specific applications. Low-pressure loads are suitable for training, while higher-pressure rounds offer improved terminal performance for defensive use.

Accuracy and Maintenance

Accuracy depends on proper setup and maintenance. Key factors include proper bore diameter, bullet seating depth, and optimal powder charges. Regular cleaning and inspection of firearm components are essential for reliable performance and extended service life.

FAQ

What is 300 Blackout Subsonic ammunition?

300 Blackout Subsonic ammunition is designed for firearms chambered in the 300 Blackout cartridge. The “Subsonic” designation indicates that this ammunition is specifically engineered to maintain supersonic velocities when fired from suppressed firearms, while remaining subsonic in suppressed environments. This allows for suppressed fire without the signature and audible report typically associated with supersonic rounds.

Developed for military and law enforcement applications, 300 Blackout Subsonic ammunition offers improved reliability and reduced wear on suppressed firearms compared to dedicated subsonic rounds for other calibers. Common variants include copper-plated bullets and specialized subsonic projectiles optimized for suppressed use.

What firearms chamber 300 Blackout Subsonic?

The 300 Blackout is a versatile cartridge that finds application in both bolt-action and semi-automatic rifles, as well as suppressed shotguns. Rifles include the popular AR-15 platform with 300 Blackout conversion kits, while suppressed shotguns chambered in 300 Blackout offer enhanced performance and versatility over traditional 12-gauge systems.

Firearms chambered in 300 Blackout Subsonic require specific chambers to maintain proper bullet seating and reliable functioning. This includes both dedicated 300 Blackout models and rifles modified to accept the shorter cartridge.

What are the advantages of 300 Blackout Subsonic ammunition?

300 Blackout Subsonic ammunition combines superior accuracy and power retention with reliable suppressed fire. The specialized projectile design allows these rounds to maintain consistent velocity and energy transfer through suppressors, making them superior to traditional subsonic ammunition in terms of terminal performance and effectiveness.

The cartridge’s versatility also extends to its ability to use standard 300 Blackout ammunition without modification, offering flexible load options for both suppressed and unsuppressed fire. This makes it an ideal choice for tactical operators and law enforcement agencies who need reliable, high-velocity fire in any environment.

What are the limitations of 300 Blackout Subsonic ammunition?

While 300 Blackout Subsonic ammunition excels in modern suppressed firearms, it may not perform optimally in older or non-300 Blackout chambered weapons. The shorter, fatter design of 300 Blackout rounds can cause feeding and extraction issues in non-compatible guns.

Economic factors also come into play, as 300 Blackout ammunition typically costs more per round than equivalent 5.56 NATO or 7.62x39 options. This makes it less economical for casual shooters or those prioritizing cost-effectiveness.

How does 300 Blackout Subsonic compare to 10mm or. 40 S&W?

300 Blackout Subsonic offers superior range and accuracy compared to 10mm or. 40 S&W subsonic rounds. The longer 300 Blackout projectile maintains its velocity through suppressors more effectively, resulting in better downrange performance and reduced barrel wear.

While 10mm and. 40 S&W offer advantages in existing 10mm and 40 Smith & Wesson platforms, the 300 Blackout’s combination of power, accuracy, and versatility makes it the superior choice for modern suppressed arms.

What is the shelf life of 300 Blackout Subsonic ammunition?

300 Blackout Subsonic ammunition typically has a shelf life of 5-7 years when stored in optimal conditions, though manufacturers may specify shorter periods. Proper storage in a cool, dry place away from direct sunlight is crucial for maintaining ammunition reliability and performance.

Check the manufacturer’s date code and inspect ammunition visually before use, paying particular attention to primer quality and case condition. While older ammunition may still function, its performance characteristics may degrade over time.

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