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.300 AAC Black Out and the AR15

Started by Old Dog, March 31, 2011, 09:03:19 PM

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Old Dog

March 31, 2011, 09:03:19 PM
I'm an AR15 front sight base away from completing mine.

Perhaps not a full distance rifle as the velocity is down somewhat below 30-30 Winchester velocities but then again you can use heavier bullets than either the 30-30 or the .308 Winchester.  Slightly more energy at the same range as the 7.62X39 with the 16" barrel versions.

It could be a fun 25 meter AQT rifle.  Modified .223 Rem. brass, small rifle primers, .30 caliber bullets, standard AR15 parts (magazines, too) except for the barrel.  Most of the published loads so far use small amounts of pistol powder.  Not sure what muzzle blast will be like but you'd think with the relatively small amounts of fast burning powder the burning would be mostly done by the time the bullet leaves the barrel.

11 grains of Blue Dot powder and a 150 grain bullet is supposed to be worth about 1600 fps.
17 grans of H110 powder and a 150 grain bullet is supposed to be worth about 2,000 fps.
18.5 grains of IMR 4227 and a 150 grain bullet is supposed to be worth about 2,100 fps.

Almost sounds too good to be true.  I'll also be trying some of Pappy's cast bullets I bought awhile back.
"The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

—Jeff Cooper, The Art of the Rifle

nmmi9100

#1
April 01, 2011, 11:32:31 AM
What kinda can are you gonna run on your Blackout?

I'm considering building a 300 Blackout upper for the Liberty Freedom can i've got coming.  About 2-3 months wait left on this suppressor, I expect.  $200 check cleared ATF 15 March.

-David
Edgewood, NM

Old Dog

#2
April 01, 2011, 08:30:34 PM
Not sure yet.  Trying to look at different makers/costs/features and make up my mind.

I not doing too well at recovering from BRD.  They are so easy to build, modify, shoot that I keep feeling the need for another one "just a little bit different". 

There's a lot to consider.  Barrel length (currently 16"), whether to go with a screw on on a quick detachable unit, maybe even with a permanently attached unit so its not a SBR and then I can take it home for the weekend.

If I go with the QD unit it would be nice to buy it for the .300 and use it on the .223 and .22 ARs as well.

We'll see.
"The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

—Jeff Cooper, The Art of the Rifle

cswhitfield

#3
April 03, 2011, 12:08:02 AM
OK, I can't stand it any longer #).  What is a .300 AAC Black Out.  It sounds interesting but for all I know it could be something to serve ice cream.  Is it a .223 necked up to .30?  Just wondering.  Is it suppressed?  It definitely sounds neat.

csw
... what counts ... is not the rounds we fire, the noise of our bursts nor the smoke we make.  ... it is the hits that count.

Old Dog

#4
April 03, 2011, 09:00:17 AM
.300 AAC Black Out.  .300 = .30 caliber, can use any bullet my .308 can use (plus the big heavy ones the .308 is not good with).  AAC = Advanced Armament Corporation (developed the cartridge and accessories for it and I recently read Remington bought them and is now loading factory ammo for this cartridge and will be chambering rifles in the caliber).  Black Out = the name, not sure where that came from other than the intended use which is heavy bullets at subsonic velocities with a suppressor.  Supposedly very accurate out to 300 yds. with way more punch from the muzzle to 300 yds. than a suppressed 9mm but still using the AR15/M16 platform.  Everything on the rifle is AR15/M16 except the barrel, which is chambered/rifled for .30 caliber bullets.

Yeah, the cartridge is a .223 Remington altered to hold a .30 caliber bullet.  The case is shorter, so you can put a 220 or 240 grain .30 caliber bullet in it and still fit/feed using AR15 magazines.  Most of the loads developed for it are using pistol powders and the pressures are down below 40,000 psi, so they are well below .223 pressures (not sure why that). 

My reasons?

1) already have brass and easy to get more
2) already have bullets and easy to get more
3) already have primers and easy to get more
4) already experienced with putting AR15's together and swapping pieces/parts and they are easy to get
5) very quiet (reportedly) with a suppressor and very effective (advertised as being slighly more powerful than the 7.62X39 when using the same barrel length - with 150 grain bullets you get 2,000 fps easily so I'll be looking at some 30-30 bullets (maybe) if I decide to hang a deer in the garage this fall.
6) velocities are in a sweet spot for cast lead bullets (easy/cheap to get vs. jacketed bullets)
7) seems, by looking at the amount of powder used vs. the velocities to be a very efficient cartridge (small amounts of powder used get pretty decent velocity)
8) If I decide to drop the caliber at some time in the future all I need to do is put a .223 barrel on the rifle

and, light easy to shoot rifle at AQTs that give me .30 caliber holes in the paper.  Believe it or not, a few years ago (3 or 4) I could shoot my M1 or M1A all day and not even get a rasberry on my shoulder.  Now, with the cumadin for the blood clot prevention I get rasberries and light bruises from a silly dang AR15 after just 20 or 30 rounds.  If it weren't for the .22 conversion kits in the AR15's I probably wouldn't do much shooting these days.

At least the 1911's haven't started bruising my hands yet :).

Its a project, no hurry, a piece here and there till I get where I'm going. 
"The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

—Jeff Cooper, The Art of the Rifle

Roland

#5
April 03, 2011, 11:27:32 AM
Website is here: http://300aacblackout.com/

Sounds neat. Please let us know how it preforms at KD.

Roland
The doorway to freedom is framed by the muskets that stood between a vision of of liberty and absolute anarchy at a place called Concord Bridge--Charlton Heston, 1997

"Be a man of principle. Fight for what you believe in. Keep your word. Live with integrity. Be brave. Believe in something bigger than yourself. Serve your country. Teach. Mentor. Give something back to society. Lead from the front. Conquer your fears. Be a good friend. Be humble and be self-confident. Appreciate your friends and family. Be a leader and not a follower. Be valorous on the field of battle. And take responsibility for your actions. Never forget those that were killed. And never let rest those that killed them." -- Major Douglas Zembiec

sparks1

#6
April 03, 2011, 12:18:16 PM
Cool stuff. Why not get a .45 ACP upper and use that? Pistol round and low velocity...a friend has one along with a 9mm too.
Great fun and inexpensive to reload...no recoil

Reminds me of the .222 necked up to 6mm years ago for a better BR round...but then the PPC came along
Integrity is easier to keep, than to regain.

The Truth is that teamwork is at the heart of great accomplishment. 
(John Maxwell)

cswhitfield

#7
April 03, 2011, 01:32:34 PM
Oh c**p!  I just started getting over my prejudices against the M16/AR rifles a couple of years ago, still did not want one but began to accept them.  Then Remington comes out with an "AR" in .243 and I start thinking I just might like to have one.  Quick go grab my M1A to calm down.  Now this!  This is just about my breaking point.  I feel that "I've got to have one" urge overtaking me and I'm hugging my M1A!!  Keep us posted please.  Now I really have start looking for a real job! :D


Quote from: Old Dog on April 03, 2011, 09:00:17 AM
.300 AAC Black Out.  .300 = .30 caliber, can use any bullet my .308 can use (plus the big heavy ones the .308 is not good with).  AAC = Advanced Armament Corporation (developed the cartridge and accessories for it and I recently read Remington bought them and is now loading factory ammo for this cartridge and will be chambering rifles in the caliber).  Black Out = the name, not sure where that came from other than the intended use which is heavy bullets at subsonic velocities with a suppressor.  Supposedly very accurate out to 300 yds. with way more punch from the muzzle to 300 yds. than a suppressed 9mm but still using the AR15/M16 platform.  Everything on the rifle is AR15/M16 except the barrel, which is chambered/rifled for .30 caliber bullets.

... what counts ... is not the rounds we fire, the noise of our bursts nor the smoke we make.  ... it is the hits that count.
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