8.6 Blackout! WHAT!!!

Status
Not open for further replies.
It not like they haven't tested this. 1: 3 at 1050 fps is not that much faster (rev/sec) than than that same bullet fired a bit over 3000 fps from a 1: 10 twist 338 Lapua Mag.

When going super sonic you're going to have to select bullets carefully. Faxon seems to indicated that bonded bullets and solid copper designed for super-sonic use stay together but non-bonded cup and core bullets can come apart.

To me 8.6 Blackout is like 300 AAC Blackout, it is a subsonic focused cartridge. I shoot very little super-sonic 300 BO, but tons of subsonic 300 BO. If I bought a 8.6 Blackout I would also shoot very little super-sonic ammo in it. If I want super-sonic 338 diameter bullets in a 308 size platform I will buy a 338 Federal. But if I am going to sling 338 diameter bullets as super-sonic velocity I would just do it right and go 338 Lapua Mag.

I am interested. And if I finally buy a 45 caliber rifle rated suppressor for my 450 Bushmaster this would be the next cartridge bought to be used with that suppressor. A SBR 700 action in this cartridge would be fun.
 
mcb said:
To me 8.6 Blackout is like 300 AAC Blackout, it is a subsonic focused cartridge.
Click to expand...

I think that’s why it took me so long to find a use for the .300 and that finally found a super load that worked.

The .50, .452 and .458 rounds will still have the weight edge and once you set the speed limit of below supersonic, the only way to can improve energy is by adding mass.
 
Looks like it's based on a .308 case. If so, that means AR10 platform. I'm heavily invested in 300 BLK, and need another platform and caliber like I need another hole in my head. Well, I guess it gives the net ninjas something new to cry about not being able to get ammo for.
 
Blue68f100 said:
All depends on the pressure. the 458 SOCOM has a 308 base, expanded up then necked for the bullet. It runs on the AR15 platform, 35k psi max. Uses LP primers too.
Click to expand...
I used another primer for my 458SC maybe LR. can’t remember
 
.455_Hunter said:
This might be a cartridge development that is actually new territory, and not just repackaging of previous ballistic performance
Click to expand...

Pretty close to the Soviet 9x39 cartridge. But yes, not just another manbun bottleneck. The 9x39 throws a 250gr bullet at 1000 fps from a 10.5" barrel. Its based on (obviously) the 7.62x39 case.

The 8.6 interests me as a single shot pistol round. I wonder if MGM will offer a contender barrel chambered in it?
 
BigBlue 94 said:
Pretty close to the Soviet 9x39 cartridge. But yes, not just another manbun bottleneck. The 9x39 throws a 250gr bullet at 1000 fps from a 10.5" barrel. Its based on (obviously) the 7.62x39 case.

The 8.6 interests me as a single shot pistol round. I wonder if MGM will offer a contender barrel chambered in it?
Click to expand...
Manbun! lol

and why?
 
AJC1 said:
Stack this cartridge in the bin with the new 30 as uninterested.
Click to expand...
I agree to me this is even more underwhelming beyond the surface than the 30sc.
mcb said:
I am interested. And if I finally buy a 45 caliber rifle rated suppressor for my 450 Bushmaster this would be the next cartridge bought to be used with that suppressor. A SBR 700 action in this cartridge would be fun.
Click to expand...
I just ran the numbers in Streloc between the Hornady Sub X 450 load and a .338 300gr SMK and killed my interest.
With a 100 yard zero the drop at 200 is 32" and 30" respectively.
 
Blue68f100 said:
All depends on the pressure. the 458 SOCOM has a 308 base, expanded up then necked for the bullet. It runs on the AR15 platform, 35k psi max. Uses LP primers too.
Click to expand...
mavracer said:
I agree to me this is even more underwhelming beyond the surface than the 30sc.

I just ran the numbers in Streloc between the Hornady Sub X 450 load and a .338 300gr SMK and killed my interest.
With a 100 yard zero the drop at 200 is 32" and 30" respectively.
Click to expand...
That does sort of kill it, just SBR the 700 in 450 and load/buy one type of ammo. 450 in a 308 length action can also push some super heavy bullets increasing energy and BC for subsonic loads.
 
Blue68f100 said:
All depends on the pressure. the 458 SOCOM has a 308 base, expanded up then necked for the bullet. It runs on the AR15 platform, 35k psi max. Uses LP primers too.
Click to expand...

Nah, all about length. 8.6 exceeds the max length that you can run in the 15 platform, by it's appearance. 458 Socom, 50 BW etc are intended to remain under 2.26, which is it for the 15......anything longer has to move up to the 10 platform in the AR world. 8.6 looks like it's going to be significantly longer, and will likely only fit in a .308 magazine. It'll be a 10 platform round. Plus, the 15 market is saturated, ain't much room for another sub caliber there. My guess is they are trying to leverage the BC of the current crop of .33 caliber bullets to make a 1000 fps 300 yard shooter on the 10 platform. I could be wrong, but that's what it looks like to me. I'd also guess that part of the driver here is that you get the ability to push supers into the .308 velocity area.....also........upper change gives you .308.........world of difference in ultimate performance abilities over the 15.
 
Last edited:
I'd bet that the barrel twist makes for some interesting reaction on impact. Like maybe some crazy wound channel that a slower twisting bullet wouldn't create. It will probably do more damage than most subsonic projectiles of similar weight would do.
 
BigBlue 94 said:
Why does it interest me in a SSP? I like throwing big hunks of lead down range at low velocities.

What would be even cooler is that new Savage 110 pistol chambered in 8.6BO with an SBR stamp and suppressor. Ive got a pair of the old Savage Striker bolt actions and absolutely love em.
Click to expand...
Sounds like a Plan! except the ManBun … WERE? lol
 
What can the 8.6 do that a 350 legend with 200 + grain bullets can’t do? Runs on a AR-15 lower. bullets both solid, jacked, and cast are established. Lots of loading data available. Subsonic means heavy bullets, the 350 delivers.
Disclosure, I have a 350 and am working up subsonic loads for function, accuracy, economy presently.
The challenge with subsonic is the same challenge black powder loads experienced 125 years ago, the only way to increase performance is to increase weight, then to increase bullet diameter, hence the.45-70 with 500 gr loads.
 
tactikel said:
What can the 8.6 do that a 350 legend with 200 + grain bullets can’t do? Runs on a AR-15 lower. bullets both solid, jacked, and cast are established. Lots of loading data available. Subsonic means heavy bullets, the 350 delivers.
Disclosure, I have a 350 and am working up subsonic loads for function, accuracy, economy presently.
The challenge with subsonic is the same challenge black powder loads experienced 125 years ago, the only way to increase performance is to increase weight, then to increase bullet diameter, hence the.45-70 with 500 gr loads.
Click to expand...
DANG!!! you just crushed the 8.6 Black narrative. I want to see a straight wall 308 cartridge in a AR-10 platform
 
Mark_Mark said:
DANG!!! you just crushed the 8.6 Black narrative. I want to see a straight wall 308 cartridge in a AR-10 platform
Click to expand...

If I understand you correctly, you would be looking at a 45 Raptor.

It is basically a Rimless .460 S&W Mag.
You just do a barrel swap on an AR-10 Platform Rifle.

The only thing special is the magazine. It's is a modified .308 mag.
You need to use steel mags.
You can also buy them.

There is also someone that has 3D Printer Plans for the Follower and Spacer.
 
dredd said:
If I understand you correctly, you would be looking at a 45 Raptor.

It is basically a Rimless .460 S&W Mag.
You just do a barrel swap on an AR-10 Platform Rifle.

The only thing special is the magazine. It's is a modified .308 mag.
You need to use steel mags.
You can also buy them.

There is also someone that has 3D Printer Plans for the Follower and Spacer.
Click to expand...
NICE! I’m a big fan of the .460! was my 1st revolver.

Here the thing, when I think AR-10, I think BIG! already got most of the big bores in AR-15 platform. Why can’t they just neck up .308 to straight Wall!
 
Mark_Mark said:
Might, but the name sounds very 1984. 8.6 Black Sounds RAD
Click to expand...
Yep!

Deer armor levels have increased SIGNIFICANTLY in the last 40 or 50 years.

Unless they're shot with a modern cool sounding "Magnum" or better yet a "Creedmoor", modern deer are pretty much immune to the effect of firearms. :)

It almost feels like willful animal cruelty when I shoot them with my old fashioned .257 Bob, 6.5x55 or 30-06.

Even my .375 H&H feels somehow inadequate since it's so old and outmoded... :rofl:
 
Swampman said:
Yep!

Deer armor levels have increased SIGNIFICANTLY in the last 40 or 50 years.

Unless they're shot with a modern cool sounding "Magnum" or better yet a "Creedmoor", modern deer are pretty much immune to the effect of firearms. :)

It almost feels like willful animal cruelty when I shoot them with my old fashioned .257 Bob, 6.5x55 or 30-06.

Even my .375 H&H feels somehow inadequate since it's so old and outmoded... :rofl:
Click to expand...
Deer Armored! I blame PETA
 
tactikel said:
What can the 8.6 do that a 350 legend with 200 + grain bullets can’t do? Runs on a AR-15 lower. bullets both solid, jacked, and cast are established. Lots of loading data available. Subsonic means heavy bullets, the 350 delivers.
Disclosure, I have a 350 and am working up subsonic loads for function, accuracy, economy presently.
The challenge with subsonic is the same challenge black powder loads experienced 125 years ago, the only way to increase performance is to increase weight, then to increase bullet diameter, hence the.45-70 with 500 gr loads.
Click to expand...

In some sense not much, but a few minor things makes 8.6 BLK slightly better for subsonic use. Most 350 legends don't have the twist rate to stabilize 300 gr + bullets. 8.6 BLK was designed for 300 gr + bullets utilizing a very fast twist rate. 350 legend does not have enough room in front of the case mouth for long pointy low drag bullets. 8.6 BLK does.

If you already have a 338 suppressor for your 338 Lapua.
 
Status
Not open for further replies.

Similar threads

wvfarrier
  • Locked
8.6 Blackout?
Replies
4
Views
391
wvfarrier
wvfarrier
G
  • Locked
Confusing .45. Colt manual data
Replies
7
Views
430
GaryL
GaryL
5
  • Locked
Blue Dot and 180gn Rem JHP (.40)
Replies
3
Views
413
Minnesota Wild
M
C
  • Locked
Heavier Bullets = Same Velocity?
Replies
19
Views
1K
Potatohead
Potatohead
Highland Lofts
  • Locked
Which 300 Blackout Jig?
Replies
6
Views
814
Lennyjoe
Lennyjoe
Back
Top