Accuracy of 223 out of a 300blackout rifle

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Iamduck82

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This peaked my curiosity. What kind of accuracy/consistency would 223 get while being fired from a 300blk rifle. I know you can fire form 300blk brass using 223 ammo but that seems like a waste of a good 223 round.

So how crappy would a grouping be?

Reason I ask is I'm considering switching my AR over to 300 but I have about 2000rnds of 223.... This might also just prompt me to buy a second rifle in 223.... But I'm still curious.

Anyone have any feedback?
 
I understand the shoulder on the 223 is taller than the 300... If anything it would have issues chambering a round. I don't see it blowing anything up. Chambering a 300 in a 223 would get pretty destructive though.
 
Still alive said:
Agreed.
Small derail... I was wondering if one could shoot .22LR out of a .22 Mag revolver. I was told no by my LGS. True/false?
Click to expand...

I would say not reliably because the LR case has a different tapper than the mag round... It would fit but I believe it would be a loose fit. Or might be the other way around.... Would be a waste of time... Similar to my situation.
 
From experience, it will fire, but it's so sloppy in the chamber, the bullet will not have enough energy behind it to go more than a couple inches down the barrel. I did it by accident once with a buddy's gun after he swore up and down it was a LR. I don't think he had ever fired it before. I should have noticed when rounds chambered too easily, but I had never used a revolver before and didn't have any frame of reference to go by.
 
Still alive said:
Agreed.
Small derail... I was wondering if one could shoot .22LR out of a .22 Mag revolver. I was told no by my LGS. True/false?
Click to expand...

Answer: 22LR will fire from a single action 22 Mag revolver. I know this because several years ago I fired 22LR in the 22 Mag cylinder of my herbert schmidt by mistake. There was no damage to the gun, the round hit the steel target with a satisfying 'ping'. So yes, it can work but I won't be doing that again when I still have both cylinders anyway.
 
The .22LR cartridge case is smaller in diameter than the .22 Magnum case. The .22LR case will expand dramatically. There is a pretty good chance that it will split, and release gas and brass scraps.
If a person manages to jam a .300 round into a .223 rifle, the rifle will be wrecked. The bullet is really interesting - a very, very long .223 bullet.
Case forming dies do a good job of converting .223 to .300. Why mess around with fire forming?
 
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