Home Forums Hunting & Shooting Ask The Gunwriters 300 AAC BLACKOUT.....6.8SPC all over again?

I'd personally choose a 7.62X39 upper for the AR. The practice ammo is much cheaper and more readily available. If you reload, you can do anything the blackout can do.

And what magazines do you intend to use? You tried 'em yet?

The x39 does not feed well with high-capacity AR magazines. The Blackout does. No modifications are required to the AR lower or bolt in any fashion--that is the genius of the Blackout.

With 125 grain pointed bullets, the Blackout is a 30-30 at 100 yards and further. I think it'll kill plenty well!

fwiw,
I wound up with one because I had a spare sucks. Dunno what they will prove useful for beyond a suppressed ditch panther rifle. SDN-6 can should be approved by early February...

Should it prove useless, I am going to pull the barrel off, and build a fast twist 5.56mm for the 70-87 grain fodder that turns up....




Regards, Matt.

Btw, This is the Medium Heavy AAC Barrel. Very much impressed with quality control. Barrel is nitrided CM. Makes for an interesting combination with a SS action.

AR Performance and Model 1 sales use the new C-Product 7.62 x 39 magazines. The 10 round ones work fine, I don't need 30 rounds to shoot a deer.

A couple thoughts,

Modest muzzle blast from 16" bbl.

1/8 twist will aid in opening up bullets at low velocity.

Runs in standard AR magazines.

Exceeds 30 Carbine ballistics by a big margin.

Fun factor.

I don't think it will take the shooting world by storm, but it looks like a fun little round for civvies. I kind of want one since I shoot .308" bore a lot anyway.

Crunching some data through QuickLoad looks like a 150gr Ballistic Tip at 2100 fps is possible from a 16" bbl at about 55K psi.

I've been interested in a pistol round upper (9mm/45ACP) for fun. In comparison this looks like a lot more ballistics, while still being fairly modest in the muzzle blast department, and using standard magazines.

Very, very true.

I've owned four different rifles chambered for the 6.8 SPC. One AR, two Rem 700 Tacticals and a Ruger Compact. They were all super accurate and well mannered. The cartridge has several web sites dedicated to it.

16" barrel

I'm with you on the fun part nothing like a pistol round carbine for fun and when the SHTF...



Ruger PC40, the trigger pull was so bad it took two good men to pull it....

I wonder if the decibels would be lower from a 16 inch supersonic 300 blackout vs a 16 inch 5.56?

Quickload predicts muzzle pressure roughly in the 5K psi range for the supersonic 300BO, and 11K psi range for 5.56.

Subsonic 300BO in the 1K psi range.

If you are going to get an AR platform rifle, the 6.8, 7.62x39 or AAC Blackout would be great. If you are going to get a bolt gun, there are far better and more versatile choices.

My "kids" gun is a 250 Savage. Low recoil, quite accurate and kills awesome. This rifle has killed a half dozen elk and that many deer as well as the various smaller stuff thrown in.

IF I had to do it again, in the current setting, I would choose a 260 Remington. For small shooters, I would load it down and shoot 100 grain Partitions- just like I do in the Savage. Factory ammo abounds and it can be souped up a little for longer shots when they grow a little. There is a lot to be liked about the 260 Remington.

My thoughts exactly.

+1

Terry

300 BLK is not 6.8 all over again, for a few reasons:

1. The military will actually adopt 300 BLK.
2. The brass is only 10-25 cents each while 6.8 is 50 to 75 each.
3. The ammo is $12.50 a box rather than $16 a box. Ammo will likely go to $9 a box.
4. 30 cal is more popular.
5. It uses normal magazines.
6. It uses a normal bolt.
7. ~75 companies have jumped on in 1 year. 6.8 is about 8 years old and had much less rapid growth.
8. Many optimal loads are out or coming out in 2012.
9. Works really well out of 16 inch barrels, while 6.8 and 5.56mm favor longer barrels.

A suppressor is not required for it any more than one is for 30-30 or 7.62x39mm. Just because it also has good subsonic ammo does not mean that is what it is all about.

7 year old with AAC Micro-7:

https://www.facebook.com/photo.php?...6.203519439694519&type=1&theater

FAQ:

http://www.300blktalk.com/forum/viewtopic.php?f=128&t=73274


http://www.300blktalk.com/forum/viewtopic.php?f=128&t=63922


20 shot group from a 300 BLK AR at 100 yards with iron sights. Not shot by me. Shot prone, not from a rest.



Aimpoint Micro with no magnification at 100 yards. 5 shots, 9 inch barrel:



http://www.youtube.com/watch?v=hRw-ypBgrKo

http://www.youtube.com/watch?v=Q5ALp8-d3dQ

I'd be very interested in the military adopting the BO, but I doubt that it will happen. The first time I shot the Whisper was in 1995 at Fort Bragg. Like the BO, the Whisper does what it claims to do, but it has a very limited military application. And just because there's a handful of platforms at SWC or "behind the fence" doesn't mean it's been "adopted".

I have an SSK .300 Whisper, the original by J. D. Jones and company. It has a suppressor can, also by SSK. I've worked up some loads but haven't shot anything with it. A friend has a similar, non-SSK version. He is disappointed in his, stating that it doesn't have enough power, subsonic. But, this guy deer hunts with a .30-378. It should produce .45 ACP power at a hundred yds. or so. I would think that would kill a hog or similar with well placed shots. Going supersonic is an option, but defeats the purpose of a quiet, suppressed subsonic round.

DF

Back when the .300/.221 first came out, I read several claims that the long subsonic bullets were actually quite lethal, because they almost always tumbled when they hit something. I am curious if there has been any documentation of this behavior in gelatin tests, or otherwise?

Beg to disagree on the mil adoption thing; been there, done that with the 6.8 SPC. You can puff up your chest and be really proud of what you personally did with .300 BO but until you can come up with the multi BILLION dollars it would cost to change the SCAMP lines at Lake City to .300 BO, you are pissing in the wind. Yes, several units have taken 6.8 overseas and put bad guys in the dirt with them as I have no doubt that they are also doing with .300 BO but that is a long way from general adoption.

In addition,a HUGE military draw down is gonna happen in the next 5 years when we pull out of AFG. Like it or not, someone in power is going to grow some balls and brains and decide that supporting a bunch of towel headed goat shaggers is simply not worth the cost in lives or treasure. When that happens, the military is coming home and budgets will shrink.

I'm going to guess you've talked to the same people at PM soldier systems and USMC Warfighting lab as I used to and while they make polite noises to your face, the reality is a different story. Don't get me wrong, I think the .300 BO is a great round in it's niche but just like 6.8 and 6.5G, it suffers from the 'not invented here' syndrome at Picatinny.

Their 'next big thing' is case less ammo and despite it having been in development for several decades, the permanent bureaucrats at ARDEC et al will not give up on their pet project in favor of 6.8, .300 BO or anything else conventional. Even if big daddy warbucks Freedom Group is pushing it cuz let's face it, FG is nothing compared to ATK, GD, Lockheed or BAE and those guys are your opposition in this race.


There are a few other flaws in your arguments: 8 years ago, there were about a million less AR users out there and much less mainstream interest in black rifles and calibers, hence much less interest in new cool stuff for AR's.

.300 Black Out sounds cool and trendy and is appealing to the younger demographic so kudos on finding a name that works to bring attention to the round. Don't kid yourself that the uptake on .300 BO is due entirely to the ballistic performance because the round has been out there as the Whisper for well over 20 years. Sure, you massaged the design slightly and took it out of the propriety realm of JD Jones (which, IMHO, like the 6.5G, was killing it) and made it mainstream. But please, don't pee down my back and try to tell me that the sudden interest in the round is due entirely to the performance. That BS won't fly with those of us with a grasp of history.