SIGforum.com Main Page Mason's Rifle Room You probably don't want to fire .300 BLK out of a 5.56mm barrel.
Main Page Mason's Rifle Room You probably don't want to fire .300 BLK out of a 5.56mm barrel.Page 1 2
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^^^^^ Agreed. This is known as “error proofing”, doing something in advance to eliminate or vastly reduce the chance of error. Like, when I make my daughter put her Sax in front of the door so the only way she can forget it is after tripping over it! I also have a dust cover with 300 BLK stamped inside and out. “People have to really suffer before they can risk doing what they love.” –Chuck Palahnuik Be harder to kill: https://preparefit.ck.page | |||
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Wait, what? |
I'm amazed at just how far a .30 projectile will travel down a .224 tube... “Remember to get vaccinated or a vaccinated person might get sick from a virus they got vaccinated against because you’re not vaccinated.” - author unknown | |||
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Plowing straight ahead come what may |
I spray painted the lower part of my black Magpul dedicated .300 BO mags with FDE Krylon (making them two tone) as well as marked the dot matrix spots with the caliber in silver paint...they stand out from my other Pmags like a sore thumb... Still, I look at getting them mixed up with .556 magazines sorta like having two types of powder out at the same time when reloading...don't do it...be sure. In my life I've personally seen only one rifle completely destroyed (7X57 Mauser) with bad injuries which resulted from reloading cartridges with DuPont PB powder by mistake... I too am surprised that that .308 bullet made it that far down and the shooter was not injured. ******************************************************** "we've gotta roll with the punches, learn to play all of our hunches Making the best of what ever comes our way Forget that blind ambition and learn to trust your intuition Plowing straight ahead come what may And theres a cowboy in the jungle" Jimmy Buffet | |||
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| Little ray of sunshine  |
That bullet has one hell of a ballistic coefficient. The fish is mute, expressionless. The fish doesn't think because the fish knows everything. | |||
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Member |
Am I missing something here? A 300 BO is a 30 cal bullet on a 223 casing. The mags are the SAME. The Lowers are the SAME. The mags are interchangeable -- therefore the error could occur. Sigfreund makes a good point--separate the cartridges and the rifles. When I see my RED charging handle--I know 300 BO. Same goes for my suppressor--No QD mount--direct thread so I don't send a 30 cal into a 22 cal suppressor. | |||
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People do some crazy stuff with their guns. A guy at my carry permit class was trying to load 357Sig ammo in his GP100. | |||
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Charmingly unsophisticated |
My .300s all have FDE furniture and use the .300 Magpul PMAGs. My 5.56s are all black and use smoked Lancers. I figure that way they all look and even feel different. _______________________________ The artist formerly known as AllenInWV | |||
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I’ll admit it, I tried clambering and firing 2 rounds of 300BLK in a 5.56 rifle one day at the range. Rounds chambered just fine, would not fire however. It finally dawned on me what I was doing. Took a long break after that to clear my head. | |||
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Member |
This right here is why the Army should not, and will not, adopt 6.8SPC/300BLK/6.5Grendel, etc. You do not want this to happen, and it will be even more common, in a chaotic combat environment. Whatever they adopt next will have a different OAL and an incompatible magazine. | |||
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To all of you who are serving or have served our country, Thank You |
There are cheaper ways to make swaged bullets. | |||
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The guy behind the guy |
I’ve got 7 or 8 300blk rifles and about double that many 5.56 rifles. Try as I might, I have never been able to. Get a 300blk round to chamber in a 5.56 gun or visa versa. That pic obviously shows it’s possible, but it ain’t easy based on my guns. | |||
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Stangosaurus Rex |
I only keep 3 magazines loaded with 300 blackout. On each I wrapped a couple of layers of blue and a couple layers of yellow electrical tape around the lower portion of the mag like stripes. Not only will I see the difference but I will feel it. ___________________________ "I Get It Now" Beth Greene | |||
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Member |
This is great advice. I had a panicked moment a year or two ago when my buddy, his wife, and I were out shooting. His wife was shooting, and I looked on the bench and saw 270 Win, 30-06, and 280 Remington ammunition all on the bench at the same time.  I called a time-out and policed up everything right there before it all went south.Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well. -Epictetus | |||
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Old Air Cavalryman |
I've seen both sides of this, ( as you described above and the occasional wayward .357 SIG shooters ending up with .357 MAG.  )"Also I heard the voice of the Lord saying who shall I send, and who will go for us? Then said I, here am I, send me." | |||
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"Member" |
You error proof them by leaving one of them at home. _____________________________________________________ Sliced bread, the greatest thing since the 1911. | |||
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SIGforum.com Main Page Mason's Rifle Room You probably don't want to fire .300 BLK out of a 5.56mm barrel.
Main Page Mason's Rifle Room You probably don't want to fire .300 BLK out of a 5.56mm barrel.© SIGforum 2025