8.6 Blackout is an interesting cartridge developed by Kevin Brittingham of Q and a handful of ammunition manufacturers, in general for the AR10 and Remington 700 platforms. It has been likened to 300 Blackout albeit on a larger scale, i.e., “300 BLK’s big brother” and is occasionally referred to as the “8.6 Creedmoor”.
Interestingly, the barrels mostly utilize a 1:3 twist rate (though there are some reportedly in 1:4).
Barrels for the 8.6 BLK cartridge line were initially manufactured by Faxon, as were lower receivers. Whether that company will be the only ones to build for 8.6 Blackout remains to be seen, but it seems doubtful. If 8.6 BLK sees anything close to the success of the 300 Blackout then other brands will almost certainly get in on it.
Features of the 8.6 Blackout Cartridge
• 338 Subsonic load, based around the 300 grain Sierra Match King
• Similar to 338 Federal; however, the case was shortened to work reliably with gas guns without modification to mags.
• Fits AR10 frame long guns
• Uses Standard 308 Mags
• Low-Pressure Cartridge
• Utilizes a shortened 6.5 Creedmoor case for the use of subsonic and high BC projectiles
• Current Ammo Companies in Development: Gorilla, Hornady, Black Hills, and Discreet Ballistics
Faxon Firearms has previously shown several 8.6 Blackout loads with a 300-grain bullet and a 210 grain Barnes TTSX bullet. These loads are still in development but should become commercially available in the foreseeable future.
8.6 BLK – what is it?
The 8.6 Blackout is widely spoken of as the “big brother” of 300 Blackout. The new caliber, developed by Q, completely re-imagines energy on target by using a faster twist rate – 1:3, compared to the popular twist rates of 1:7 and 1:8 for calibers like 5.56 NATO and 300 BLK.
When paired with a suppressor, these 300 grain bullets are as quiet as a .22. Plus, with the 1:3 twist, the bullet goes further and impacts harder than your traditional 1:7 twist bullet. The extra rotation is giving the bullet more spin, allowing it to travel further with more punch and expand at a lower velocity.
What about the round itself?
It’s a low-pressure cartridge utilizing a shortened 6.5 Creedmoor case, for use of subsonic and high BC 338 projectiles. Currently, Gorilla, Hornady, Black Hills, and Discreet Ballistics are in the process of developing ammunition in this caliber. And no, you won’t need any special mags for this ammo – it will fit in a standard 308 mag.
285-350 grain subsonic.
160-225 supersonic.
What kind of barrels is Faxon making, then?
We’ll have our own 8.6 BLK barrels for both AR-10 and Remington 700 platforms. The full offering (for now) will be:
Remington 700 Platform:
8″ Light Palma, Remage style with 1:3 twist
12″ Light Palma, Remage style with 1:3 twist
16″ Light Palma, Remage style with 1:3 twist
AR-10 Platform:
8″ Big Gunner with 1:3 twist
12″ Big Gunner with 1:3 twist
16″ Big Gunner with 1:3 twist
So… is Faxon making 8.6 BLK guns?
As of right now, no we are not. We’re just making the barrels. However, you’ll be able to build yourself an awesome 8.6 gun with some incredible parts from all kinds of companies. For example, one of the builds we brought to SHOT Show was a KRG Chassis, Falkor Defense action, Thunder Beast suppressor, and one of our barrels.
What are you thinking for MSRP?
Still figuring out what our final MSRP will be, but our rough ball park for these barrels will be $225-350 price range, depending on length.
Ok, we have to ask… what about the barrel life?
We can’t confirm just yet the barrel life on these, as they’re still really new. We’re currently mid-testing one and have gotten up to 1000 rounds through it.
What barrel contours will be available?
AR10 barrels will be a modified big gunner profile. Remington 700 barrels will be a modified light palma profile.
What will gas length be on the AR10 barrels?
8 and 10 pistol length, 16 carbine length.
Read the original article in its entirety at Anachrobellum.com.
