8.6 Blackout 300 GR Maker Solid – 20 Rounds

8.6 Blackout 300gr Maker Solid - Premium Subsonic Target Ammunition

8.6 Blackout is now SAAMI approved (as of January 2026). Just Cause Solutions is the first company to test 8.6 Blackout ammunition using a PCB Piezotronics Conformal Transducer according to Voluntary Industry Performance Standard as set forth by SAAMI. Every batch is pressure tested for your safety and optimal performance.

The Just Cause Solutions 8.6 Blackout 300gr Maker Solid is our dedicated target and practice ammunition, offering exceptional accuracy at an economical price point. Designed for precision shooting, training, and load development, this non-expanding solid copper projectile delivers consistent performance without the premium cost of hunting bullets. Perfect for shooters who want to practice with their 8.6 Blackout rifles without breaking the bank.

We're the first 8.6 Blackout manufacturer to own a SAAMI-spec conformal transducer for pressure testing. Every batch is verified for consistent performance and safety.

As seen on Kit Badger's channel

Economical Practice Without Compromise

Sub $2 per round = Priceless!

The 300gr Maker Solid offers the perfect solution for shooters who want to maintain proficiency with their 8.6 Blackout rifles without the cost of premium expanding ammunition. Key benefits include:

• Most economical 8.6 Blackout option - Practice more for less
• Subsonic velocity - Same trajectory as hunting loads for realistic training
• Excellent ballistic coefficient - .62 G1 BC for consistent flight characteristics
• Precision CNC-machined - Solid copper construction ensures consistency shot-to-shot
• Reduced barrel wear - Solid copper bullets are gentler on barrels than jacketed alternatives
• Works in bolt and semi-auto - Universal platform compatibility

Perfect for Training and Practice

Ideal Applications:

• Target shooting and plinking
• Zeroing your rifle and scope
• Load development and testing
• Training with your hunting rifle without hunting ammo costs
• Function testing semi-automatic platforms
• Long-range precision practice (excellent BC)
• Teaching new shooters with subsonic platforms

IMPORTANT: This is a NON-EXPANDING solid copper projectile intended for TARGET USE ONLY. If you use this projectile for hunting, please be aware you will NOT get any expansion. Use appropriate expanding ammunition for hunting applications.

Technical Specifications

Barrel Length & Velocity Data

Keep in mind the 8.6 Blackout was designed with a sub-12 inch barrel in mind. This ammunition performs across various barrel lengths. Please refer to the chart below for muzzle velocity references.

All velocities remain subsonic (under 1100 fps). The 8.6 Blackout was engineered for optimal performance from 12" barrels as designed by Q, LLC.

Why Choose the 300gr Solid for Practice?

Advantages Over Shooting Hunting Ammunition for Practice:

• Cost savings - Significantly less expensive than expanding hunting bullets
• Same trajectory - Subsonic velocity mimics your hunting loads for realistic practice
• Excellent BC - .62 G1 provides predictable, consistent flight path
• Reduced fouling - Solid copper construction leaves less residue than jacketed bullets
• Barrel-friendly - Gentler on rifling than harder projectiles
• Consistent performance - CNC-machined precision ensures shot-to-shot consistency

Training Benefits:

• Zero your rifle with affordable ammunition
• Practice holdovers and trajectory compensation
• Develop proficiency with subsonic ballistics
• Test magazine and feeding reliability
• Break in new barrels economically
• Maintain skills between hunting seasons

Requirements:

• 1:3 or 1:5 twist barrel - This 300gr bullet stabilizes in either twist rate
• Suppressor optional but recommended for range comfort
• Adjustable gas block may help optimize cycling in semi-auto platforms

Comparison: 300gr Solid vs Expanding Bullets

NOT for Hunting - Here's Why

The 300gr Maker Solid is a non-expanding projectile. This means:

• No expansion on impact - Bullet remains .338" diameter
• Ice-pick wound channel - Creates minimal tissue damage
• Poor energy transfer - Bullet may pass through without adequate energy dump
• Reduced stopping power - Not designed for humane, quick kills
• Unethical for game - Will not provide clean, one-shot kills

For hunting applications, use our expanding ammunition: 350gr Maker REX, 352gr Maker REX, or 180gr Maker T-REX. These bullets are specifically engineered for terminal performance on game animals.

Important Safety Notes

• Suppressor Consideration: Being subsonic, this ammunition is very quiet when suppressed - ideal for range use where noise matters.
• Not for .308 Winchester or 6.5 Creedmoor: Despite case similarity, NEVER fire 8.6 Blackout in .308 Win or 6.5CM chambers. This will cause catastrophic failure. Always ensure you're using the proper cartridge for your rifle.
• Backstop Penetration: Solid copper bullets may penetrate deeper than expanding bullets. Ensure adequate backstop at your range.

Frequently Asked Questions

Q: Can I use this for hunting?
A: No. This is a non-expanding solid copper bullet designed for target use only. It will not expand on impact and is not suitable for ethical hunting. Use our expanding ammunition (350gr REX, 352gr REX, or 180gr T-REX) for hunting.

Q: What twist rate do I need?
A: This 300gr bullet works in both 1:3 and 1:5 twist barrels, making it compatible with most 8.6 Blackout rifles.

Q: How does this compare to hunting ammunition ballistically?
A: The trajectory is very similar to our 350gr subsonic hunting loads, making it excellent for practice. The .62 G1 BC actually provides slightly flatter trajectory than some of our expanding bullets.

Q: Will this work in my semi-auto?
A: Yes, this ammunition is suitable for both bolt-action and semi-automatic rifles. The solid construction feeds reliably.

Q: How much money will I save using this for practice?
A: Significantly. At sub-$2 per round, you can practice extensively without the premium cost of expanding hunting bullets. Save your hunting ammunition for the field and use this for everything else.

Q: Is this accurate enough for precision shooting?
A: Yes. The CNC-machined solid copper construction and excellent BC (.62 G1) provide the consistency needed for precision work.