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View Full Version : Is the 300 BLK the next best thing?


sffred
04-10-2012, 8:04 PM
Hello fellow Calgunners!

I keep reading/hearing so many great things about AAC Blackout 300 BLK!
(a fellow calgunner corrected me, I used to think it was called 300 AAC)

A quick basic link
http://300aacblackout.com/

I understand how this is more of an efficient round compared to the .223/5.56 or the 7.62x39.
But really how readily available is it?
When I calculated it out it was still over $.50 a round?(maybe I'm wrong please correct me)
Not all LGS carry this round, and it is not available @ walmart yet? (@ least on my side of the state)

Please school me! Make me want to build a 300 BLK

For right now! IMHO I believe the 5.56 ammo variety between the 40gr to 77gr is still more readily available, common, and usefulness of each gr of any round can do more than what needed in the SHTF scenario.

IMO if u want the fun and recoil of an AK, nothing I mean nothing can beat the price of some Russian 7.62x39!

Maybe I'm going crazy with all this but damn, AAC! I barely have any experience on 300BLK, nor do I have any friends that own any firearms in This cal. And I'm already interested in it? Fml

Thanks for reading, & please don't chew me out!
I'm a rookie to this 300BLK

Sffred

MrPlink
04-10-2012, 8:18 PM
its a flavor of the month, and one that just may stick around.

It will probably be sometime if ever before it becomes a common round at your LGS.
Til then its not too hard to track on the net, and given what it costs reloading would seem the way to go.

clutchy
04-10-2012, 8:35 PM
meh... I don't get it at all, not to mention one of it's draws is completely unavailable in CA. Subsonic suppressed.

meh...

clutchy
04-10-2012, 8:36 PM
.....

tiger222
04-10-2012, 8:52 PM
I'll tell you a secret. M193 55gr fmj 5.56mm x 45mm out of a 20" 1/12 twist barrel.
read the trial transcripts of the Mai Lai Massacre if you are not sure what it can do.
It's all anyone really needs, if that is a concern. Otherwise get a 22lr and have fun.

tpc13
04-10-2012, 10:17 PM
Get the 300 I'm just about ready to pull the trigger. It uses a 308 bullet same AR mags and better energy than a .223. Check out Youtube for loading the 300. You can cut down .223 brass and reload your own for half the price. I've been doing research lately. Also Sota arms has cheap lowers..check them out..

Akers
04-10-2012, 10:26 PM
Get the 300 I'm just about ready to pull the trigger. It uses a 308 bullet same AR mags and better energy than a .223. Check out Youtube for loading the 300. You can cut down .223 brass and reload your own for half the price. I've been doing research lately. Also Sota arms has cheap lowers..check them out..

I hate to say it, but Palmetto runs deals every once in awhile on their lowers marked multi cal for $49.00 or Nathan @ Tactical Machining has great quality lowers at a fair price, with some of the best service around. I own 4 TM lowers and love them!

http://www.tacticalmachining.com/receivers/lower-receivers/300-blackout-lower-receiver.html

I built mine on a 80%, and even though you can't suppress in CA, it is still a heck of a round to play with.

russ69
04-10-2012, 10:50 PM
I like small cartridges and have a 300 BLKOUT but it's not a very versatile cartridge. I have it because it's neat little dude but the 6.8 SPC does a whole lot more. If you have a half dozen AR15s then yes, get one, otherwise there are better choices.

zfields
04-10-2012, 10:53 PM
Its like 7.62x39, but cost 3x as much.....

toby
04-11-2012, 4:37 AM
It's just the latest fad, it will do nothing the others cant do. Next month the 300+ wipeout.

Richard Erichsen
04-11-2012, 6:34 AM
Hello fellow Calgunners!

I keep reading/hearing so many great things about AAC Blackout 300 BLK!
(a fellow calgunner corrected me, I used to think it was called 300 AAC)

A quick basic link
http://300aacblackout.com/

I understand how this is more of an efficient round compared to the .223/5.56 or the 7.62x39.
But really how readily available is it?
When I calculated it out it was still over $.50 a round?(maybe I'm wrong please correct me)
Not all LGS carry this round, and it is not available @ walmart yet? (@ least on my side of the state)

Please school me! Make me want to build a 300 BLK

For right now! IMHO I believe the 5.56 ammo variety between the 40gr to 77gr is still more readily available, common, and usefulness of each gr of any round can do more than what needed in the SHTF scenario.

IMO if u want the fun and recoil of an AK, nothing I mean nothing can beat the price of some Russian 7.62x39!

Maybe I'm going crazy with all this but damn, AAC! I barely have any experience on 300BLK, nor do I have any friends that own any firearms in This cal. And I'm already interested in it? Fml

Thanks for reading, & please don't chew me out!
I'm a rookie to this 300BLK

Sffred

You really have to examine the SAAMI specs to cut through the hype. The case holds less propellent than the 7.62x39 mm but can operate at slightly higher pressure. Actual ballistics with the supersonic loads are no better than the 7.62x39 and lesser than handloads that can be crafted with the larger case capacity using either resized commercial .308 projectiles, lower BC hard cast or modern, though significantly less common .310-.311 caliber bullets.

The primary value of this new cartridge is the use in commonly available AR15 platforms without having to change a substantial number of assemblies. It's primary goal was for use in subsonic form on suppressor equipped weapons, the supersonic loads came later.

As a boutique cartridge, it's not going to be cost competitive with 7.62x39, even of the domestic types. It's a cartridge meant to fill a specific niche and compliments rather than replaces other calibers. If you do not handload, it's value may be limited to what you can afford at 2-10 times the price of the availalable options with military surplus M67 7.62x39 ammunition the cheapest. If you aren't planning to run a suppressor, there are some very successful 7.62x39 AR15s out there that run perfectly well.

Here are some data points for the flavor of the week caliber .300 BLK:

7.62x35 (.300 ACC Blackout) - 300 BLK
2.26" max length per SAAMI
Case length 1.368"
Small rifle primer
55,000 PSI pressure max
Rifling twist 1:7"

125 grain 2215 FPS, 1360 Ft. Lbs.
220 grain 1010 FPS, 498 Ft. Lbs.

Reasons for new case:
Taper caused issues without modified lower receivers able to use curved magazines like the AK
Modified bolts were needed due to the larger case head diameter. 6.8 SPC and 6.5 Grendel had similar issues.

The .300 AAC achieves 503 yards max effective range with supersonic loads, 219 yards with subsonic loads.
With 125-135 grain OTM, similar or better performance can be had with the 7.62x39.

Compare these to 7.62x39:
7.62x39 mm case - 35.5 grains capacity, 51,488 PSI max pressure. As with any short case, they are more efficient than longer cases and drive bullets to higher velocities using somewhat less propellent. The taper allows for easier extraction in dirty chambers, with a similar taper found in many cases, including .30-06 Springfield. Modern propellents allow for velocities on the 125 grain projectiles of 2550-2600 FPS (vs. 2350 FPS more typical of quality military loadings).
By comparison: 7.62x35 mm case - 26 grains capacity. Loads featuring very heavy bullets of 150 grain @ 2100 FPS (very near max pressure loads), and 175-180 grain @ 1900 FPS (max pressure loads) can be created with 7.62x39mm. Typical factory ammo values will be 15% lower than max pressure loads for safety reasons.

.310" bullets from Barnes, Sierra and Hornady have significantly better BC and terminal performance than standard military FMJ ball loadings, improving on this old cartridge. Modern propellents can increase velocity by 200 FPS or so without reaching dangerous levels of pressure. Barnes TSX-BT all copper bullet with hollow point is an interesting case in point for modern projectiles. In summary, if you want a .30 cal carbine, there is plenty of room for improvement and available load books to create a very capable 7.62x39 mm load tailored to your unique needs and weapon without having to opt for a boutique caliber that promises to do more or less the same thing, with a few less parts swapped from your rifle. However, when you are feeling lazy and just want to shoot, 7.62x39 milsurp is an impossible to beat bargain.

R

joelogic
04-11-2012, 7:08 AM
The 300BLK has been around longer than a fad. I have been reloading it since Feb of last year.

http://www.calguns.net/calgunforum/showthread.php?t=414569

It's just the latest fad, it will do nothing the others cant do. Next month the 300+ wipeout.

Its not about doing something different, its about doing it easily and cheaply.
Brass can be made from free range pick up brass.
Cheap pulled surplus bullets can be used.

hawaii five-0
04-11-2012, 7:19 AM
300 blk is not the best choice for a full length rifle in my opinion, unless it will be supressed.However,it is a great choice for short barreled applications.If you dont reload,ammo will be expensive.But if you do,ammo is DIRT cheap.I use free brass and pulled bullets(12 cents)for plinking.It is basicly a 300 whisper,and has been around a long time.Kinda bridges the gap between .223/5.56 and 9mm ARs.

chicoredneck
04-11-2012, 7:25 AM
Is it the next best thing - no.
Is it the next "in" thing- yes.

The 300 is here to stay for a while. It has significant commerical backing and a well run advertising campaign. On top of that many people seem to think that because a cartridge is .30 caliber, it magically has "it". After the inital hype, I suspect it will be about as popular as the 6.8 spc.

For my use, I personally don't see the appeal unless you want to run short barrels and/or suppressors. The 300blk is indeed impressive in 9-10" barrels. For a 16" barrel the 6.8 does everything the 300 does, but better (assuming supersonic).

The one nice thing is magazine commonality between 5.56 and 300blk. Although, that could be a bad thing also.

Richard Erichsen
04-11-2012, 7:27 AM
The 300BLK has been around longer than a fad. I have been reloading it since Feb of last year.

http://www.calguns.net/calgunforum/showthread.php?t=414569



Its not about doing something different, its about doing it easily and cheaply.
Brass can be made from free range pick up brass.
Cheap pulled surplus bullets can be used.

As a reloader, you have an advantage to most folks who look to this and several other calibers fitting into the "boutique" category. For folks who only buy commercial ammo, it's probably not worth it.

R

Uxi
04-11-2012, 8:23 AM
I am growing on it. Only need a new barrel really and can reuse 5.56 magazines and even bolt. I still prefer 6.8 but the economics of 300 AAC are hard to argue with. If/when a barrel is available, going to get one for my ACR.

duc748bip
04-11-2012, 10:24 AM
Want one for my next AR pistol. Since short barrel is where the round shine. One can argue its more effective then a 5.56 out of a pistol length barrel.
of course there is no need for the heavy subsonic round in CA.

HilaryForPresident
04-11-2012, 11:29 AM
Meh. Recently there was all the noise about 6.8 SPC. It will pass. I mean there are about 5-7 most common calibers like .223, 7.62, .308 etc. that are always available and dont cost nearly as much as new calibers. They can also do the job juuuuust fine.

repubconserv
04-11-2012, 11:33 AM
The one nice thing is magazine commonality between 5.56 and 300blk. Although, that could be a bad thing also.

I am truly at a loss at this statement :confused:

zfields
04-11-2012, 11:42 AM
I am truly at a loss at this statement :confused:

Some dumbass throwing 223 into a 300blk gun.

Knight_Who_Says_Ni
04-11-2012, 11:46 AM
300 BLK isn't a fad, SHOT Show this year made that pretty clear. A ton of companies are developing guns for this caliber, far more than 6.8.

rsilvers
04-11-2012, 6:28 PM
meh... I don't get it at all, not to mention one of it's draws is completely unavailable in CA. Subsonic suppressed.

meh...

It is especially good for CA because it uses preban magazines with 30 round capacity. That is not the case with 6.5 or 6.8.

rsilvers
04-11-2012, 6:30 PM
I like small cartridges and have a 300 BLKOUT but it's not a very versatile cartridge. I have it because it's neat little dude but the 6.8 SPC does a whole lot more. If you have a half dozen AR15s then yes, get one, otherwise there are better choices.

There is no cartridge more versatile. It can shoot 100 to 240 grain bullets.

rsilvers
04-11-2012, 6:31 PM
Its like 7.62x39, but cost 3x as much.....

7.62x39mm does not work well in ARs. ARs happen to be popular now. This is the best way to shoot 30 cal in an AR15.

rsilvers
04-11-2012, 6:32 PM
It's just the latest fad, it will do nothing the others cant do. Next month the 300+ wipeout.

The others cannot do what 300 BLK can do. 30 cal, 30 round capacity, in normal AR magazines.