New Caliber - 300 AAC Blackout
- Thread starter OnPointFirearms
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beware the blackout! 
everybody that gets a .300 blackout already has a 5.56... bolts and mag interchangeable .
.300bk is loaded with various bullets ranging from 240 gr subsonic to 110 gr at about 2400fps.
much of it is loaded in cases headstamped .223 or 5.56 nobody reads headstamps anyways.
So what's the problem?..
...Those hot 110 gr loads will fit in your 5.56 chamber. and you probably will not even need to tap the forward assist to lock it in.
KABOOM!!!!!! :banghead:
It's all good fun till someone gets their head blowed off
everybody that gets a .300 blackout already has a 5.56... bolts and mag interchangeable .
.300bk is loaded with various bullets ranging from 240 gr subsonic to 110 gr at about 2400fps.
much of it is loaded in cases headstamped .223 or 5.56
nobody reads headstamps anyways.So what's the problem?..
...Those hot 110 gr loads will fit in your 5.56 chamber. and you probably will not even need to tap the forward assist to lock it in.KABOOM!!!!!! :banghead:
It's all good fun till someone gets their head blowed off
Nefariousd
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That's a joke right?
300 round won't go into battery in a .556 chamber probably even if you used a sledge hammer on the forward assist...........
300 round won't go into battery in a .556 chamber probably even if you used a sledge hammer on the forward assist...........
oldpapps
Member
'....Those hot 110 gr loads will fit in your 5.56 chamber. and you probably will not even need to tap the forward assist to lock it in.
KABOOM!!!!!!'
This tweaked my interest.
I pulled out a 16 in M4 type and a 20 round mag of my 110gr 300 AAC Blackouts. OK, the rifle isn't a true 5.56 chamber, it is a .223 Wylde.
I slowly lowered the bolt and stripped a round into the chamber. Wouldn't go to lock-up... Pulled the bolt back and rattled the round out. The extractor hadn't caught.
I flat dropped the bolt. This time the extractor went over the rim... Still didn't go into battery.
When I pullet that round out, it has little nicks where the throat rifling hit the ogdive of the bullet. My measurement doesn't show any set-back.
I load my 110gr V-Max loads to an COAL of 2.010 inches (I have also went as short as 2.000 inches).
Results: For my weapon/loads, I don't find this to be a very valid possibility. In theory, with much shorter bullets or bullets seated much deeper or a great deal of set-back, maybe.
Opinion (everyone has one and most stink - mine does):
If one works hard to be stupid or do dangerous things, it will happen. I have been shooting for way too many years and have never fired a 308 Win in a 30.06 Spfd chamber or loaded a .44 mag into one of my 303 British rifles. I would like to see actual reports and photos of these weapons that have been blown up.
KABOOM!!!!!!'
This tweaked my interest.
I pulled out a 16 in M4 type and a 20 round mag of my 110gr 300 AAC Blackouts. OK, the rifle isn't a true 5.56 chamber, it is a .223 Wylde.
I slowly lowered the bolt and stripped a round into the chamber. Wouldn't go to lock-up... Pulled the bolt back and rattled the round out. The extractor hadn't caught.
I flat dropped the bolt. This time the extractor went over the rim... Still didn't go into battery.
When I pullet that round out, it has little nicks where the throat rifling hit the ogdive of the bullet. My measurement doesn't show any set-back.
I load my 110gr V-Max loads to an COAL of 2.010 inches (I have also went as short as 2.000 inches).
Results: For my weapon/loads, I don't find this to be a very valid possibility. In theory, with much shorter bullets or bullets seated much deeper or a great deal of set-back, maybe.
Opinion (everyone has one and most stink - mine does):
If one works hard to be stupid or do dangerous things, it will happen. I have been shooting for way too many years and have never fired a 308 Win in a 30.06 Spfd chamber or loaded a .44 mag into one of my 303 British rifles. I would like to see actual reports and photos of these weapons that have been blown up.
If a 300 boobytrap finds its way into a mag full of 5.56 it may slam into place while fireing. That is my best guess as to why they have been blowing up .
We should at least be aware and encourage loaders to make ammo that is long enough and solidly crimped.
We should at least be aware and encourage loaders to make ammo that is long enough and solidly crimped.
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R.W.Dale
Member
Your point being that we all must ensure that we shoot the proper ammunition in our firearms.
Wow that's a groundbreaking revelation! I'm so glad you brought that to our attention.
FYI 7.62x39 will chamber and headspace on THE BULLET in a 243! There ya go more panic for you to ponder
posted via that mobile app with the sig lines everyone complaints about
Absolutely. Here is a demo for this specific case though. The primary concern here would be a bench with mixed mags and ammo, and someone grabs the wrong one since the mags are the same. Organization and paying attention is the simple prevention. http://youtu.be/Dq2TjenPWmQ
The fix here is so simple. Revise the case dimensions. By adding just 2mm to the case neck (no change to the shoulder or any thing else.). It would be 'self crimping' if jammed in the 5.56chamber.
Maybe this would be no big deal if the blackout were just another sporting round, ( some persons get a lot of sport making fun of other peoples misfoutunes.) But the blackout is being promoted as a tactical/paramilitary round. Interchangeable magazines full of boobytrap ammo do not inspire confidence in the ranks.
Maybe this would be no big deal if the blackout were just another sporting round, ( some persons get a lot of sport making fun of other peoples misfoutunes.) But the blackout is being promoted as a tactical/paramilitary round. Interchangeable magazines full of boobytrap ammo do not inspire confidence in the ranks.
R.W.Dale
Member
Do you have an instance you can cite of 300blk blowing up a 223?
A poster above noted a 110g round will not go fully into battery.
Either way this falls under the most basic rules of firearm safety of ensuring you have the correct ammunition and only keeping one caliber THE CORRECT CALIBER close at hand.
Any blowups as a result of cramming 30 caliber ammunition in a 22 caliber firearm is absolutely a 100% failure of the users abilities to safety employ a firearm.
A poster above noted a 110g round will not go fully into battery.
Either way this falls under the most basic rules of firearm safety of ensuring you have the correct ammunition and only keeping one caliber THE CORRECT CALIBER close at hand.
Any blowups as a result of cramming 30 caliber ammunition in a 22 caliber firearm is absolutely a 100% failure of the users abilities to safety employ a firearm.
v8stang289
Member
http://www.300blktalk.com/forum/viewtopic.php?f=128&t=78182
RW Dale, Scroll down in that thread and it has pictures and a link of someone blowing up a DD 5.56 upper with a 300 blk round. I think in his case they think the momentum of the bolt caused the bullet to set back into the case and allowed the cartridge to chamber. I've been thinking about getting a 300 blk and stumbled upon that thread.
It would seem as though a good crimp die might stop this potential problem.
RW Dale, Scroll down in that thread and it has pictures and a link of someone blowing up a DD 5.56 upper with a 300 blk round. I think in his case they think the momentum of the bolt caused the bullet to set back into the case and allowed the cartridge to chamber. I've been thinking about getting a 300 blk and stumbled upon that thread.
It would seem as though a good crimp die might stop this potential problem.
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http://snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=3067632
This reminds me of all the M2 .50cal headspace accidents that keep on occuring year after year. Of course we can always blame some stupid private each time it happens over and and over year after year for the last 80 years.
This reminds me of all the M2 .50cal headspace accidents that keep on occuring year after year. Of course we can always blame some stupid private each time it happens over and and over year after year for the last 80 years.
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R.W.Dale
Member
I utterly reject this fallacy. As a handloader h110 looks just like h335, and yet I've not blown my face off yet from using the former instead of the latter to load 223
Safe firearm and ammunition handling practices will nip this at the bud. If 300blk getting into a 223 is an issue for you then you have far larger underlying issues going on. For those of us who actually pay attention to what we carry to the bench much less cram into the chamber its a non issue.
posted via that mobile app with the sig lines everyone complaints about
R.W.Dale
Member
Folks determined enough can and do find a plethora of ways to cause themselves firearm related harm without this one caliber cataclysm of wich you speak
posted via that mobile app with the sig lines everyone complaints about
Quit drinking the Kool-aid. Open a book for some education instead.
Collector0311
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My 556 and 300 setups stay color coordinated for simple visual recognition. I load 300blk into tan pmags and my 556 into black. My uppers have AFG's in tan and black (also one has glass right now and one doesn't. Much easier differentiation) plus when I'm taking my brother in law and his friends out for weapons safety talks and practice it's much simpler for them to grasp and not be confused. Just my double penny moment.
The length and shoulder are a product of the requirement to fit in a standard mag. These dimensions have been shown to work well by the 300 whisper for a while. Yes, there is a higher risk of swapping cartridges, but it is not an inevitable situation. If you are that concerned, get a 7.62x40 WT and shave the ribs in the mag
You read about folks putting the wrong ammunition in the wrong chamber all the time.
So, I guess following some of the logic here, we should only have one rifle, one shotgun, and one hand gun.
How many folks have multiple m1911s in different cartridges, multiple N frame Smiths in different cartridges, multiple Remington 700s in different cartridges and the list could go on?
So, I guess following some of the logic here, we should only have one rifle, one shotgun, and one hand gun.
How many folks have multiple m1911s in different cartridges, multiple N frame Smiths in different cartridges, multiple Remington 700s in different cartridges and the list could go on?
Collector0311
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I think you guys are trying to fix a problem that is benefiting us all in many ways...natural selection. A man naturally selects the wrong load for his rifle, and nature selects his butt right out of the gene pool
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