Can a 300BLK round be chambered in a 223 Rem? - Graybeard Outdoors
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post #1 of 14 (permalink) Old 11-11-2019, 01:07 PM Thread Starter
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Default Can a 300BLK round be chambered in a 223 Rem?

Since the .300 blk is a .308 bullet in a .223 case , is it possible it can be chambered and fired by mistake in a .223 barrel ? ,which would be catastrophic .
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post #2 of 14 (permalink) Old 11-11-2019, 03:41 PM
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If the Throat on Your .223 is big enough to chamber a 30cal Bullet...I'd say you got problems already....
300BO is shorter then .223, so maybe Ya could chamber one...and if the Extractor was holding It....You Might be able to touch it off...
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post #3 of 14 (permalink) Old 11-11-2019, 04:24 PM
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Nope. The bullet hits the chamber shoulder before the bolt closes.

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post #4 of 14 (permalink) Old 11-11-2019, 04:26 PM
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It looks to me to be too fat at the neck area unless you slammed the barrel closed pushing the bullet deeper into the case... I never tried to fit one in the other but possibly could be a forced catastrophe with heavy bullets. But the little 110 gr or 125 gr I shoot may chamber.... thejanitor

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post #5 of 14 (permalink) Old 11-11-2019, 04:29 PM
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Don't try this at home!!

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http://bulletin.accurateshooter.com/...23-rem-barrel/




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post #6 of 14 (permalink) Old 11-11-2019, 04:36 PM
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In a Handi it may not be so catastrophic, maybe similar to a 7.62x39 fired in a 243 Win.

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https://www.go2gbo.com/forums/108-h-...tml#post376612

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post #7 of 14 (permalink) Old 11-11-2019, 10:57 PM Thread Starter
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As they say , a picture is worth a thousands words .
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post #8 of 14 (permalink) Old 11-12-2019, 09:15 AM
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All depends on how long that .30 cal bullet was set, or if it can be set back a bit by bolt slamming home.


Similar to the one powder on the bench rule, if you own both, only one (correct) ammo on the bench at a time.

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Started with .223 Ultra Bull barrel. Added .357 Talo barrel. Added an action and stock set bought here, 7.62x39 barrel. Then bought complete guns .444 Marlin and .300 Blackout. Leaving me at 4 complete rifles plus a barrel. Plus a 9mm stub job bought here, and I have been finding and buying H&R shotguns at our local pawn shop where they seem to go cheap.
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post #9 of 14 (permalink) Old 11-12-2019, 10:20 AM
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It did not take long for a 300Blk to be fired in a 5.56 (.223) barrel. I was an early adopter of this caliber and was researching many aspects of reloading for it. The image like shown above was circulated on most boards discussing the 300Blk, the warning came out very early on, but it happened anyway, and keeps happening.

https://www.thefirearmblog.com/blog/...-combinations/


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post #10 of 14 (permalink) Old 11-12-2019, 10:52 AM
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Quote:
Originally Posted by quickdtoo View Post
If I hadn't seen the pictures I wouldn't have believed it. I think on an AR platform you'd need plenty of "forward assist" to get the bolt to close?

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