The importance of using the correct ammunition

Dani

Dani

Well-known member
Supporter
We had a gun come in and the action was seized shut. AR-15 style gun and the barrel was chambered 223 Wylde. The hypothesis was that someone screwed up and put a 300 Blackout into the chamber and fired it. Ultimately that hypothesis proved true. We had to totally destroy the upper and ended up finishing destroying the bolt to get the bolt out of the barrel. There was a 300 Blackout in the barrel, the bolt was cracked in half and some of the headstamp impressed onto the bolt face.

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Be careful y'all.

Dani
 
There was a 300 Blackout in the barrel, the bolt was cracked in half and some of the headstamp impressed onto the bolt face.
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The shooter's lucky his forehead wasn't impressed with the headstamp. Not much chance of forcing a .308 slug down a .223 bore.
 
Paul Taylor said:
I'm no rifleman but how does a 308 casing fit into a 223 chamber?
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300 blackout is a 556 case cut down and necked up to fit .308 cal bullets. AR-15 platform

308 aka 7.62x51 NATO is Ar-10 platform.

It happens, friend of mine found 9 rounds of 300 slowout in a brand new unopened box of federal 556 ammo.

The AR-15 action preformed exactly how it was supposed to work, in the case of a over pressure situation. Gas by passed and blew out the mag and magwell and the gas relive vents in the bcg.
 
Clinton John said:
300 blackout is a 556 case cut down and necked up to fit .308 cal bullets. AR-15 platform

308 aka 7.62x51 NATO is Ar-10 platform.

It happens, friend of mine found 9 rounds of 300 slowout in a brand new unopened box of federal 556 ammo.

The AR-15 action preformed exactly how it was supposed to work, in the case of a over pressure situation. Gas by passed and blew out the mag and magwell and the gas relive vents in the bcg.
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Roger that. I only have one 556/223 and I'm a novice at that. I'm clueless about the 300 blackout.
 
As stated by Clinton, the 300 Blackout uses the same case as a 5.56x45mm, just cut down and the neck opened to accept a 30 caliber bullet...you can really see the difference in this picture. I know someone who tried to put a 223 Remington into a 300 Blackout and the action wouldn't close. Perhaps if you forced the action, you might be able to get it closed but that was a clue to that person that something wasn't right.

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It happens, friend of mine found 9 rounds of 300 slowout in a brand new unopened box of federal 556 ammo.
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Unfortunately, that box of ammo had been opened by someone. Probably purchased, shot a few from a couple different guns and got the ammo mixed up, refilled the box and returned it hoping nobody would be the wiser. Then the store trusted the customer, and resold it as unopened. I've encountered this same thing a number of times over the years at mom and pop gunstores. Sometimes wrong caliber, or worse a handful of lousy reloads, which really frosts me. This is precisely why many gunstores don't accept ammo returns.
 
Carl said:
Given liability issues, I am surprised any store would accept ammo returns.
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I agree, but it's not uncommon at small stores. Used firearms are a big profit center for gun shops, markup on new guns is typically minimal. I've seen ammo brought in with used guns intended to be traded toward the purchase of new ones. Maybe that's the primary return to stock route.
 
Makes you wonder if the shooter slammed the forward assist realllly hard one last time???
 
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