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Did the .300 Blackout (BLK) Die Out?

They are. the 190 Hornadys expand reliably and don't do that.
Yes, the SUB-X is an amazing bullet. I've also had great luck with the 208 A-Max for subs.

I've killed out to 230 yards with my pistol version, dropped a doe in her tracks during "alternative methods" season a few Decembers ago.

I've also had good luck using it "like a bow" as you say, killing them with sub-sonics out to about 60 yards. If I'm going to take the kids hunting in the blind, you bet your butt I'm not going to use a super-sonic round, even with a suppressor. The kids are begging to go out with dad this year and I'm not going to get their hearing damaged over the thrill of their first hunt.
 
I guess anything is possible but I don't see how a 300BLK would chamber enough to allow the AR to FOB.
The neck diameter of the BLK is much larger than a 223 and overall length of the two is virtually the same.
But, I don't wish to try and prove me wrong.

Forum Boss: See photo pasted above.

I can tell you for fact though a 300BLK will chamber and fire in a 22-250 bolt gun. I actually saw someone do it. Thank goodness the 300BLK is fairly low pressure and the rifle was a well built one. The 110 Amax bullet really got swaged down in that 224 barrel. Barrel had a slight bulge, detachable magazine floor plate let go and the extractor was MIA but shooter unhurt.
Being able to see how does not mean much, my 2 gun smith's tells me it's the #1 reason for 5.56 blowups. I've know him 40 years and he says he's seen more blown rifles in the last 10 years then the entire time he's been fixing guns.
 
When the SEALS adopt something it becomes a marketing tool. That's not always a good thing. However the ballistics, the handling characteristics and energy on target are where they should be for both the 300 and the 6MM ARC. However thr ARC is being better received and I believe it's because of its inherent accuracy and reach. However I really see the 300 as a 21st century CQB asset.

Yes you get blown up 5.56 rifles because some designer was dumb enough to allow chambering in a 5.56 rifle. WTF, the general shooting public does need an ounce+ of prevention. More brains wouldn't hurt though!

No it's not a bench rest cartridge. Yes it's an effective round for hunting man or beast within its range.

I own none but I have shot 3, yes I put the 5.56 AR away while the 300 was on the range. I really liked the rifle, cartridge combination. I didn't buy one because I've got that area covered and I have no need for suppressed fire.

I see it as a great truck/hunting rifle, a great special forces rifle and I kind of understand why it wasn't better received. My only guess is that the working rifle has a limited market.
 
Its not hard to figure out how to make your gun not blow up.

First, clearly mark the upper with a "300" somewhere you'll see it. I did one with sharpie or paint.

Second, mark all magazines clearly with a "300" and if you can, only use 300 magazines and make them a different color if possible.

Those easy tips along with not having out 5.56 guns at the same time will prevent it from happening.
 
Yes you get blown up 5.56 rifles because some designer was dumb enough to allow chambering in a 5.56 rifle. WTF, the general shooting public does need an ounce+ of prevention. More brains wouldn't hurt though!
If this was the case, then almost every 308 based cartridge was designed by someone dumb enough to allow it to be chambered in a 30.06 based cartridge chamber.

It's user error plain and simple.

Another issue is internet chatter and bright ideas not fully thought out.

At some point someone decided a great way to establish a seating depth/COL that would insure reliable feeding of a 30 caliber bullet from a 22 caliber magazine, was to take .223 case and mark the bullet on the ogive at case neck diameter. This would place the .223-.250" portion of the bullet on the rib that guides a .223/5.56 round in the magazine. This almost guarantees that the round will chamber in a .223/5.56 chamber.

This again is user error.

Anyone that has spent time on forums discussing the 300 Blackout cartridge, a majority of the threads start out, I'm new to shooting, never had an AR, I want to handload because ammo is not to be found or is expensive, I need load data for these bullets and powder I found in the neighbors garbage can.

Then when things go wrong, blame the cartridge, then bash it instead of the users on the internet.
 
YES!
And this is exactly how the cartridge should have been designed, or even with the slightly smaller 6.8 SPC
case head. Either version would totally eliminate ever being chambered and fired in a .223 AR.
I have 300 BO's, AR and bolt, but strongly dislike any potential of joining the ka boom club,
or, even worse, the possibility of someone else "borrowing" my equipment/mag/ammo and doing it.
My BO mags and rifles -even the bolt gun, plus ammo cans and ammo boxes, all have red bands painted around them. Red/Red - or no shoot.

Some people who think they know better comment that I'm overly cautious, but like the Tee Shirt says,
"Before you start something, consider there are reasons I'm this old".
I seem to recall that JDJ designed the original(Whisper) at the behest of the SF community. They wanted it based on the 221, 222, 223 bf, primarily as a logistics consideration.
Hindsight is indeed 20-20, so I reckon everyone has the option to buy or move along. I agree that it would be “better” if it would not chamber, but hopefully we can all agree that until someone loads a mag w/a BO, inserts said mag into a 223, drops the bolt, disengages the safety then squeezes the trigger, there really isn’t much of an issue. Of course, after all those things have been done, as Gramps used to say, “it ain’t gonna be purty!”
 
If this was the case, then almost every 308 based cartridge was designed by someone dumb enough to allow it to be chambered in a 30.06 based cartridge chamber.

It's user error plain and simple.

Another issue is internet chatter and bright ideas not fully thought out.

At some point someone decided a great way to establish a seating depth/COL that would insure reliable feeding of a 30 caliber bullet from a 22 caliber magazine, was to take .223 case and mark the bullet on the ogive at case neck diameter. This would place the .223-.250" portion of the bullet on the rib that guides a .223/5.56 round in the magazine. This almost guarantees that the round will chamber in a .223/5.56 chamber.

This again is user error.

Anyone that has spent time on forums discussing the 300 Blackout cartridge, a majority of the threads start out, I'm new to shooting, never had an AR, I want to handload because ammo is not to be found or is expensive, I need load data for these bullets and powder I found in the neighbors garbage can.

Then when things go wrong, blame the cartridge, then bash it instead of the users on the internet.
I agree user error.

However buttholes at the range BS'ing and not paying attention, a crap hole under fire in a life and death situation leaves little time for thinking.

A pocket pistol without a manual safety, a user with a small child in one arm, a bag of groceries in the other arm and a toddler in tow, drops the car keys accidentally in the same pocket as the firearm. When they attempt to pull the keys out they start to pull the trigger. SAFETY lever on the firearm is safety in the myriad of situations a person uses a pocket pistol.

I had built a custom 450 Marlin to shoot 60,000+ PSI, 500 grain loads about 17,000 PSI over SAAMI. Basically a 458 x 2 wildcat. Except the 500 grain cartridge is too long for a 450 Marlin lever gun and the belt on the Marlin is larger than any other belt making loading it in the lever gun or any other magnum impossible. SAFETY FIRST!

There's bad design and bad thinking and the 300 is a potentially unsafe design, potentially in the hands of a large group of wannabe rifleman. All because the designer didn't put SAFETY first in the design. BAD design!

Then there's the bad thinking, the guy who didn't check the rounds in a mag, the person who thinks people are perfect and don't make mistakes and lastly the designer who disregarded the first rule of firearms, SAFETY!

Safety doesn't just happen it's by design, in equipment and training.
 
I agree user error.

There's bad design and bad thinking and the 300 is a potentially unsafe design, potentially in the hands of a large group of wannabe rifleman. All because the designer didn't put SAFETY first in the design. BAD design!
I absolutely agree with everything, except the above paragraph, and we may never agree.

I am not willing to concede that a 308 Winchester is an inherently bad design, simply because you can chamber some loads in a 270 or 25-06 chambered rifle and blow it up. Because the 308 was developed decades later it should never have been allowed on the market..

There are plenty of examples available of those scenarios happening, and the same holds true with other cartridges where the parent cartridge was longer.

I might even be willing to say that based on rounds fired, with rifles chambered in both 223/556 and ammo within reach of another rifle and ammo chambered in 300 Blackout, that per round fired, it might just happen less with the Blackout.

Again that's based on shear numbers fired, and kabooms experienced. It will boil down to who has more shooting accidents and when calculated by percentage.

The other fact that would need to be sorted out would be, Who is more likely to share the video on Uboob for us all to see.The bolt action guy, Or the AR guy?

Does it happen more with the AR crowd? or are they just more likely to share it with the world?
 
I absolutely agree with everything, except the above paragraph, and we may never agree.

I am not willing to concede that a 308 Winchester is an inherently bad design, simply because you can chamber some loads in a 270 or 25-06 chambered rifle and blow it up. Because the 308 was developed decades later it should never have been allowed on the market..

There are plenty of examples available of those scenarios happening, and the same holds true with other cartridges where the parent cartridge was longer.

I might even be willing to say that based on rounds fired, with rifles chambered in both 223/556 and ammo within reach of another rifle and ammo chambered in 300 Blackout, that per round fired, it might just happen less with the Blackout.

Again that's based on shear numbers fired, and kabooms experienced. It will boil down to who has more shooting accidents and when calculated by percentage.

The other fact that would need to be sorted out would be, Who is more likely to share the video on Uboob for us all to see.The bolt action guy, Or the AR guy?

Does it happen more with the AR crowd? or are they just more likely to share it with the world?
Let's examine this logically, the 308 is a 1952 adopted design, the 300 blackout 2011. The former is a 70 year old adaptation and 59 years later an even worse mistake was made.

In 52 they designed by 1950's standards, one would hope that 2011 designs would have 21'st century standards.

We could expound on the value of the 7.62x51 forever but suffice to say the concept that other chambers could accept the round and produce unsafe conditions (assuming it exists), is bad but 70 years ago less experience was applied to designs. It was 2 years before I was born so I can attribute the design flaw to the time period. In those days average people were less educated but had more firearm common sense.

However in 2011 not only was the chambering mistake made, the new cartridge fit into a magazine designed for the most popular rifles ever sold in the U.S.. The 5.56 blowup by chambering 300 Blackout is well documented. Today people are more educated, not only having much less firearm common sense but having much greater expectations of design safety. In my opinion due to the modern common high average of human stupidity.

I would not invest in companies that produce such obviously flawed designs. Some idiot will do something and convince a jury of their peers and we all know where that goes.

I have custom firearms built, I reload, I have no hot 45 70 loads around to blow up an old Springfield or lever gun, I designed my custom 450 Marlin load for my custom bolt gun so it cannot be fired in inappropriate rifles, all head stamps on my brass for reloaded ammunition match the cartridge and rifle.

Why? I will not live forever, I want the firearms and ammunition I leave for my family to be safe. In the modern world I expect cartridge designs to be thought out and not chamber in a firearm that it can destroy.
 
Once one adopts "safety" as the arbiter of firearm design, it's a short road to things like the S&W internal revolver lock, or six pound trigger pulls.

We won't even talk about all that "explosive" powder you keep up in the reloading room.

I have not the slightest sympathy for someone who blows up a firearm because they chambered a round it was not designed for.

People who need the firearm itself to protect them from doing stupid things... will inevitably find a way to do something stupid anyway. Firearms demand thought and care. You can't design that in.
 

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