See what happens when you fire a 300 in a 223 upper

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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AR-300
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See what happens when you fire a 300 in a 223 upper

Post by AR-300 »

PSA 10.5" & 16'' FN CHF CL 300 AAC Blackout
Poppy83
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Re: See what happens when you fire a 300 in a 223 upper

Post by Poppy83 »

I wouldn't think you could even chamber a 300 round in a 223 barrel. Wouldn't the larger diameter of the 300 BLK prevent it from actually entering the barrel? Apparently not...
abinok
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Re: See what happens when you fire a 300 in a 223 upper

Post by abinok »

Handloads with light bullet tension I would bet.

Had to happen sooner or later I guess. Back when I worked at a gunrange I saw 243 in 308, 308 in 30-06, 300win in 300 weatherby, and a few others. 243 in a 270 caused some excitement when he finially got a good primer strike that fired. I always wondered how long it would take before somebody loaded a 338 federal in a 30-06.
Seattle
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Re: See what happens when you fire a 300 in a 223 upper

Post by Seattle »

I guess that's what a pop and no kick would look like. Wonder what it would have been like if he had a metal magazine?
eracer
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Re: See what happens when you fire a 300 in a 223 upper

Post by eracer »

That looks nasty, OP. Glad is wasn't worse than that.

Wrong magazine or wrong upper?
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AR-300
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Re: See what happens when you fire a 300 in a 223 upper

Post by AR-300 »

not mine, saw this over at arfcom and thought i would cross post
guy grabbed the wrong magazine and KB!
PSA 10.5" & 16'' FN CHF CL 300 AAC Blackout
Embalmer883
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Re: See what happens when you fire a 300 in a 223 upper

Post by Embalmer883 »

I bet a quick punch to the forward assist pushed the bullet right on back in the case.
Gun-fun
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Re: See what happens when you fire a 300 in a 223 upper

Post by Gun-fun »

I wondered about the chance of that happening, so I dropped a BLK round in the 5.56 and released the bolt, it was close so I tried the forward assist but thankful it wouldn't go :) Then I tried a 5.56 into the BLK nogo, so it seems a crimped round is safe.
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