spoon go boom-

[lane912]

300 Blackout in a .223 Wylde AR-15 Kaboom


---One of the huge draws of the 300 AAC Blackout (AKA 300 BLK) is that it can use the same bolt and magazines as a .223/5.56 AR-15. The only downside? It can use the same bolt and magazines as the .223/5.56 AR-15.

A friend and reader presented me with a box of AR-15 upper receiver parts this past weekend that vividly illustrates what happens when a distracted or negligent person loads magazines.

A single 300 BLK cartridge somehow found it’s way into a box of loose .223 cartridges, and was subsequently loaded into a 30-round PMAG, which was then handed to an AR-15 shooter shooting a rifle chambered in .223 Wylde (a chambering that is supposed to shoot both .223 Remington and 5.56 NATO equally well).

The .223 cartridges in the magazine went “bang-bang-bang.” The 300 Blackout round apparently fed into the chamber just fine, the shooter pulled the trigger, and what you’ll see on the following pages were the result of the ensuing kaboom.

Luckily, the shooter was shaken, but uninjured.---

[nynor]

i bet there were some quick trips to change shorts after that!

[onewhippedpuppy]

I bet that made one hell of a noise.

[tsiegwart]

A 300 blackout won't fit in a 223/5.56 chamber.

Something is wrong with this story.



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[MotoSook]

My first thought as well.

A 300 blackout won't fit in a 223/5.56 chamber.



Something is wrong with this story.







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[BlueSkyJaunte]

There is way more to the story here that is not being published. It would take some serious effort to mistake a .300BLK round for .223.

[emcon5]

Yeah, I am going to go with "Smells like bullshiat"

Three on the left are 300 blackout, #4 is 5.56.


In case the img link doesn't work: File:Five bullets.jpg - Wikipedia, the free encyclopedia

Unless, and this is a big unless, the neck tension was inadequate in the 300 round and it slamming into the chamber pushed the bullet farther into the case (and the powder charge was such that there was room in the case to do so). It is also possible that the rifle was not completely in battery.

[lane912]

.223 Wylde --

The .223 Wylde is a proprietary rifle cartridge chamber with the external dimensions and lead angle as found in the military 5.56×45mm NATO cartridge and the 0.2240 inch freebore diameter as found in the civilian SAAMI .223 Remington cartridge. Rifles with a .223 Wylde chamber will typically accept both .223 Remington and externally slightly larger 5.56×45mm NATO ammunition.[1]

The .223 Wylde hybrid chamber was designed by Bill Wylde of Greenup, IL to exploit the accuracy advantages of the .223 Remington chambering without pressure problems or compromising the functional reliability of (semi) automatic weapons like the AR-15 family when using 5.56×45mm NATO military ammunition.[2] Coincidentally, it shoots the relatively long and heavy 80-grain (5.18 g) bullets commonly used in the sport of Highpower Rifle Competition very well and is one of the preferred chambers for that use. The Wylde chamber is used by a few rifle manufacturers who sell "National Match" configuration AR-15 rifles, barrels, and upper receivers.

[HHI944]

Not buying it.....I've heard stories of people accidentally shooting 5.56 out of a 300 barrel though....apparently it can wreak havoc on the rifling

[Jeff Higgins]

Originally Posted by emcon5

Unless, and this is a big unless, the neck tension was inadequate in the 300 round and it slamming into the chamber pushed the bullet farther into the case (and the powder charge was such that there was room in the case to do so). It is also possible that the rifle was not completely in battery.

This is probably exactly what happened - inadequate neck tension, and maybe an extremely long ogive like the bullet on the left. That one looks like it might chamber in a .223 chamber even if the bullet were not pushed back.

I'm not sure than an AR can fire out of battery, though. Unless it were as equally poorly assembled as the ammo. There are plenty of those out there - homemade AR's assembled from cheap, missmatched components that have no business being fired around other people.