School me n the pros of the 300 blackout...

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School me n the pros of the 300 blackout...

Post by Joe S. on Sat Mar 03, 2012 6:32 pm

Seems inticing and its all the rage lately but ive been thinkin about it. Whats the difference in it and a 308 sub sonic at the same velocity? If using it in a non AR platform...

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Re: School me n the pros of the 300 blackout...

Post by Vermilion on Sat Mar 03, 2012 6:37 pm

Wonder what the differences between 300 blackout and 300 whisper.

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Re: School me n the pros of the 300 blackout...

Post by Rw on Sat Mar 03, 2012 6:38 pm

*paging nonnie to the blkout thread*

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Re: School me n the pros of the 300 blackout...

Post by BigDaddyQ on Sat Mar 03, 2012 6:51 pm

As far as I and 2 other friends of mine who own 1 a whisper and 1 a blackout. There is no difference in the 2. They both will shoot each other and cycle in AR's. Now whether or not that is because they are fireforming to the chamber us 3 don't know. The whisper lover says its because blackout copied the whisper and beat it to standardizing.
The advantage of a blackout/whisper to a 308 has entirely to do with subsonic loads. Supposedly you can have a great amount of void space in a 308 which can cause a shape charge and blowing the chamber up. I would think thats a bit unrealistic, but thats what I've heard. I bought it to use in an AR. The advantage is it can fit standard mags and it will still cycle the bolt subsonic. I'm not sure if I was going bolt gun I would go for it. I might opt for a pistol caliber. 45long colt maybe.

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Re: School me n the pros of the 300 blackout...

Post by Joe S. on Sat Mar 03, 2012 6:55 pm

So... With a 308 SS you need filler for handloads? Or larger grained powder?

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Re: School me n the pros of the 300 blackout...

Post by BigDaddyQ on Sat Mar 03, 2012 7:02 pm

From what I've found most people end up using trailboss a "fluffy" powder to fill up more of the case at subsonic loads. This gives a more consistent ignition and better accuracy. Like I said earlier I don't really buy into the whole shape charge thing but void space can cause inconsitent ignition

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Re: School me n the pros of the 300 blackout...

Post by SubGunFan on Sat Mar 03, 2012 7:04 pm

I too look forward to the PROs and CONs of the 300 Blackout. I have been wanting an AR 300 Blackout upper for a while. My "problem" is...... being different......... I want a Dissy upper. 300 Blk in Dissy upper seems to be non-existent these days. I am still looking.....

To get ready for my future 300 Blackout AR upper, I have bought dies, powder and 200 - 225gr BTHP bullets. I don't own a can (suppressor), but will ask for the chance to use someone else's 30cal can.....

PLEASE....... Post what you know about the 300 Blackout.

.

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Re: School me n the pros of the 300 blackout...

Post by jakeg823 on Sat Mar 03, 2012 7:15 pm

PLEASE....... Post what you know about the 300 Blackout.

Make that 3 of us Smile

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Re: School me n the pros of the 300 blackout...

Post by miker84 on Sat Mar 03, 2012 8:18 pm

I know that I've been pending on a can for 5 months for my 300. I've loaded 125 through 220gr projectiles using h110 and 1680. The 1680 almost fills the case on subsonic loads.

The main advantage ( purely my opinion) is that it cycles subsonics in the AR platform. In a bolt gun, I suppose it could be an affordable way to shoot 30 Cal subsonics?

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Re: School me n the pros of the 300 blackout...

Post by SubGunFan on Sat Mar 03, 2012 8:47 pm

Cycling heavy bullet subsonic ammo in the AR is a PRO in my book.... Smile

From what I have read, the 300 Blk is a relative short-range round. IIRC, 400yds with a 125gr bullet and 200yds with 220gr subsonic bullet. It is what it is...... and I can live with that. Bullet weight & velocity combo is a little less than the 7.62x39 AK-47 round. But I feel the AR platform makes up for this by being a more accurate rifle.

PLUS...... It is easy to make 300 Blk brass from 223/5.56 brass.

.

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Re: School me n the pros of the 300 blackout...

Post by BigDaddyQ on Sat Mar 03, 2012 10:13 pm

My friend has killed many deer and other furry woodland creatures with his whisper. He has a integrated suppressed barreled 300whisper bolt gun. As an experiment he shot a whole box of blackouts he bought from the store through it and had no problems. I got a SOTA arms blackout upper in the mail friday afternoon. I have not picked out optics yet but am pretty sure I'm going with a sightmark night rader night vision scope. I will be purchasing a DPR can as soon as they are available and start waiting for form 4. I fired one at Necks suppressor shoot and I can say it is very quiet and cycled off the shelf SS ammo. As far as its ballistics you only get so much uhmp and still get subsonic. If you are buying it for a supersonic round you are wasting your money. It will shoot supersonic but there are much better performers out there.

so my pro cons list is
pro
cycles ARs subsonic
easy to make ammo from 223
factory loads available at vans sub and super
uses existing 223 mags
is 30 cal so can use can on multiple guns
also have several 30 cal bullets laying around
less case void space
fairly accurate

cons
limited supersonic capabilities
if not going with AR lower there are better subsonic options ie bigger calibers

here is mine I think its purdy.

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Re: School me n the pros of the 300 blackout...

Post by Joe S. on Sat Mar 03, 2012 10:23 pm

It is purdy

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Re: School me n the pros of the 300 blackout...

Post by patchz on Sat Mar 03, 2012 10:27 pm

I understand Sig is coming out with an upper in 300 blk for their 516.

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Re: School me n the pros of the 300 blackout...

Post by Southbreeze on Sun Mar 04, 2012 1:01 am

If you are buying a bolt gun, buy 308. We shot a Accuracy International bolt gun in the Houston Armory bullet tube, can on, and it was quiet...I just can't see building a bolt gun for that purpose alone in 300blk. Just me, I guess.

My research, that led to my purchase of a 300blk upper, showed that it came around for one reason, more down range energy than the present 556 nato and it only required a barrel change to make it work for the present M16's in the military field. It fits everything else that you have for 223/5.56.

It mimics the performance of the 7.62x39, without the issues that come with that conversion...which is more expensive 1.new barrel 2.new bolt 3. new magazines.

Added bonus, it will cycle the heavy sub-ammo.

It's a great upgrade for a present AR, swap out barrel and you have a new gun for under $300.

Other than the above, it isn't anything really special. If I was building a building a bolt gun.....the 308 has so many more options. How much sub-sonic are you going to shoot? I mean really shoot? You have to look at twist rate to stabilize the heavy sub bullets, they just will not fly straight from a regular twist bbl. I've got 32 rounds out of a 50rnd box of EBR 7.62x39 Sledgehammers ($75/box) that I quit shooting because my present x39 upper wouldn't stabilize 'em.

300blk is cheaper to shoot - I just bought 220grn sub-ammo for $16/box and full bang 130grn for $21/box.

NOTE: If anyone is thinking they are going to kill all the feral pigs, with sub ammo/can, forget it. You'll kill more, but, the first slap that bullet makes punching hide/bone; they are gone.

I hope this has been of some use,
Breeze

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Re: School me n the pros of the 300 blackout...

Post by Joe S. on Sun Mar 04, 2012 8:15 am

Thanks breeze. Big help. Kinda makes me understand the infatuation with it lately

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Re: School me n the pros of the 300 blackout...

Post by SubGunFan on Sun Mar 04, 2012 9:35 am

I have noticed the factory ammo prices also. I don't understand why sub-sonic ammo is cheaper than super-sonic ammo. To me the heavier sub bullets would cost more due to the amount of materials used. True, super-sonic ammo might contain more powder, but have you priced 200-225gr BTHP bullets lately.

One point in the 300 Blackout development was having a sub-sonic round for the AR platform that had much more stopping power than the 9mm sub-sonic round.

I also agree as stated, I would not waste money building a 300 Blackout bolt-gun. The AR and 300 Blk are a perfect match in my book......

.

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Re: School me n the pros of the 300 blackout...

Post by nonnieselman on Sun Mar 04, 2012 1:10 pm

Loading a 308 with 9.5GR trailboss and a 210gr SMK, theres a bunch of air space in the case.
With the 300BO subsonic 240gr loads we did, your almost goin to have a 100% no air space.

You would think it would have an edge on accuracy with the case volume. Compared like a 30-06 to a 308.

I gave up waiting on my 300 BO AR barrel. So im ordering a barrel for my stevens 200. Wont have to worry bout cycling issues then. And be a nice setup to take kids hunting with.
110gr Vmax does work on a deer.

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Re: School me n the pros of the 300 blackout...

Post by BeRichH on Tue Mar 06, 2012 4:21 pm

nonnieselman wrote:
I gave up waiting on my 300 BO AR barrel. So im ordering a barrel for my stevens 200. Wont have to worry bout cycling issues then. And be a nice setup to take kids hunting with.
110gr Vmax does work on a deer.

Which barrel did you have on order? I have a 9” AAC barrel for one build. I'm looking for a 16” for another build but don't want to break the bank.

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Re: School me n the pros of the 300 blackout...

Post by nonnieselman on Tue Mar 06, 2012 4:58 pm

Delta company 10.3"

Ended up goin with tapered 16.25" for the strvens

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Re: School me n the pros of the 300 blackout...

Post by Rw on Tue Mar 06, 2012 5:04 pm

Where did you order the Stevens barrel, nonnie? As soon as I find the right savage/Stevens I want to order one to

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