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Posted: 1/6/2019 10:37:19 AM EDT
[#1]
Just because I haven’t seen it said yet,
DO NOT TRY TO USE THAT BARREL AGAIN EITHER Unless you’re planning on replacing the extension or relegating it to a .22lr conversion. Stating the obvious here, but the bolt and extension lock together to contain the chamber pressure when you fire a round. If the bolt isn’t safe to use because of a kaboom, the extension isn’t either. Fortunately bolts and barrels are fairly inexpensive these days, but your life, limbs, and eyesight are worth more than those parts even if they were expensive. |
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Posted: 1/6/2019 9:41:47 PM EDT
[#2]
So I shouldn't shoot the cheap bbl I got from a kaboom?
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Posted: 1/6/2019 10:44:10 PM EDT
[#3]
When in the Air Force, brother-in-law had a round go off before the bolt was fully in battery on an M-16. Was wearing shooting glasses; but now has eye shadow below his right eye where burnt powder was forced into his skin. So, yeah they can fire out of battery. A dirty floating firing pin could cause something like this.
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Posted: 1/7/2019 12:43:16 PM EDT
[#4]
So I figured the best way to prevent this in the future is to put all my rounds into stripper clips. A cheap and effective solution.
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Posted: 1/7/2019 1:33:59 PM EDT
[#5]
Quote HistoryQuoted:
When in the Air Force, brother-in-law had a round go off before the bolt was fully in battery on an M-16. Was wearing shooting glasses; but now has eye shadow below his right eye where burnt powder was forced into his skin. So, yeah they can fire out of battery. A dirty floating firing pin could cause something like this. |
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Posted: 1/24/2019 5:45:00 PM EDT
[#6]
Quote HistoryQuoted: Yeup, there it is. We had a .300 BO kaboom thread just last week in fact, complete with video; and quite similar to OP's story. good luck getting that bullet out. Easiest way to test is to see how far the cleaning rod goes down one end, and how far down the other. If the difference in length is quite a bit longer than a typical 223 bullet... https://www.weapon-blog.com/wp-content/uplods/2014/03/300-aac-blackout-5.56-rifle.jpg |
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Posted: 1/24/2019 5:56:22 PM EDT
[#7]
Quote HistoryQuoted: Ah, that makes sense. I did some quick reading and some threads said it's nearly if not completely impossible to fire an AR out of battery. So there goes that theory... |
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Posted: 3/15/2019 9:20:10 PM EDT
[#8]
as a side note, I am very very surprised that anyone ever designed an AR15 cartridge like 300BO that could also fit into a 5.56mm chamber. The potential for kabooms like this is just way too high.
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Posted: 3/15/2019 11:15:33 PM EDT
[#9]
Quote HistoryQuoted:
as a side note, I am very very surprised that anyone ever designed an AR15 cartridge like 300BO that could also fit into a 5.56mm chamber. The potential for kabooms like this is just way too high. |
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Posted: 5/19/2019 9:01:04 PM EDT
[#10]
I was at the local range one day.. Found a bunch of 41 Mag, 44Mag and 45LC brass on/near one bench. One of the .44 was missinng 3/4 of the sides and the base was bulged split and the primer missing. There was some blood, dried on the bench. I figure the shooter put a 44 Mag in his 45LC & shot it.
Lesson for all do not have ammo on the bench that is not the caliber you are shooting, PERIOD |
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Posted: 6/17/2019 9:04:37 PM EDT
[#11]
What did the other fired cases look like?
Your powder charge is mild, 24.5 to 25.0 grains of H335 is commonly used with 55 grain bullets without problems. Your powder measure was thoroughly cleaned of all previous powders prior to starting your reloading session? A small amount of pistol powder, left in the measure, will blow up any rifle. Did your ammo ever get stuck in the chamber if you didn't fire it, forcing you to mortar the rifle to extract a round? Excessive amunition height (headspace) may have allowed the rifle to fire with the bolt not completely closed. Your brass looks like an extreme overcharge or the wrong powder. |
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Posted: 6/17/2019 9:10:33 PM EDT
[#12]
And in this thread, we see who resurrects a thread without reading like... any of it!
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Posted: 6/18/2019 5:01:15 PM EDT
[#13]
Quote HistoryQuoted:
Start painting your mag basses.... Or do what i do.... Metal mags = 5.56 Plastic mags = 300 blk out |
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Posted: 9/11/2019 8:47:48 AM EDT
[#14]
.300 Blackout will chamber in a 5.56mm if the bolt gets a running start at it.
Lots of Kabooms lately exactly because of this. The .30 caliber bullet gets forced inside the case further. If the bolt closes completely you are screwed. I think you'll discover a 2" long .224" bullet stuck in the barrel. .30 cal. get really long when squished that small. Your very fortunate you didn't get hurt. |
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Posted: 9/11/2019 8:51:05 AM EDT
[#15]
Quote HistoryQuoted:
Here is another shot of the bolt/carrier. I think the bolt might actually be usable if I get a new extractor. http://www.firearmtutorials.com/article-images/kaboom/AR-15-kaboom-6.jpg |
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Posted: 9/11/2019 9:04:28 AM EDT
[#16]
Quote HistoryQuoted:
It was intentionally designed NOT to fit in a 5.56x45mm chamber. But ARs have H2 buffers and the Forward Assist to overcome pesky factory crimps. Quote HistoryQuoted:
Quoted:
as a side note, I am very very surprised that anyone ever designed an AR15 cartridge like 300BO that could also fit into a 5.56mm chamber. The potential for kabooms like this is just way too high. |
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Posted: 9/11/2019 9:05:12 AM EDT
[#17]
This why my 300BO is store in locked ammo cans and is only loaded in FDE mags... scary stuff
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Posted: 10/12/2019 6:58:27 AM EDT
[#18]
Quote HistoryQuoted:
DUDE! Change something. Change a lot of somethings! Get dedicated .300 BO mags that are visually highly different in appearance. Get dedicated ammo boxes and ammo cans that are visually highly different in appearance. Or get rid of .300 BO entirely, unless you're running suppressed; go with 6.5 Grendle or something else that won't fit. Quote HistoryQuoted:
Quoted:
We have a winner... 1. You CAN chamber a 300 BLKOUT round and fire in 5.56. I had this happen a few times over the years but the it caused some type of malfunction like a feeding error or bolt was out of battery. ... Or get rid of .300 BO entirely, unless you're running suppressed; go with 6.5 Grendle or something else that won't fit. |
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Posted: 11/7/2019 10:10:58 AM EDT
[#19]
Quote HistoryQuoted:
Here is another shot of the bolt/carrier. I think the bolt might actually be usable if I get a new extractor. http://www.firearmtutorials.com/article-images/kaboom/AR-15-kaboom-6.jpg I would personally cast the carrier, any fragments and the bolt into a translucent resin and keep it on my desk. |
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Posted: 11/9/2019 11:18:17 PM EDT
[#20]
All my .300blk mags are Pmags in FDE. That's ALL they are used for. Black Pmags are .223/5.56.
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Posted: 11/17/2019 12:53:44 AM EDT
[#21]
Quote HistoryQuoted: then its design sucks. Tried them in 30 assorted ARs at an interested local shop. Many makers, all prices, .223, 5.56, Wylde chamberings. Twentytwo of them wouldn't chamber at all. five were just short of chambering; a few FA taps closed three of them. 3 chambered easily, even closing the bolt slowly by hand. 1 in 10 odds. My 300 BO's and ammo are locked up separately, and only go out when no 5.56 rifles are going. Have suppressed one bolt gun that will regularly ring a 3" plate at 200 yards, so hate to part with them. (195 gr ELD-M, CFE BLK, loaded to stay subsonic out of a 16"). The ding seems nearly as loud as the shot. |
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