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Offline Jason F

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could this work for the blackout
« on: June 24, 2012, 10:11:07 PM »
Could you have a 223 barrel rebored to 30 caliber and use it for the 300 blackout. You would not have to mess with extractor.
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Offline LaOtto222

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Re: could this work for the blackout
« Reply #1 on: June 24, 2012, 11:37:46 PM »
Simple answer - no. The 223 case is longer than a 221 case


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Offline Jason F

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Re: could this work for the blackout
« Reply #2 on: June 25, 2012, 12:56:59 AM »
Yes,but the rebore would remove the complete shoulder of 223 chamber, would that leave enough metal for 300 blackout reamer
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Offline LaOtto222

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Re: could this work for the blackout
« Reply #3 on: June 25, 2012, 01:32:44 AM »
I am not sure why you are asking, if you have the answer.

Now the long answer - Think about it, the body of the 223 is .375" in diameter the bore of the Blackout is .308. .308 does not clean up the shoulder of a .375" case, and the 221 reamer will not be long enough to clean it up either. With a bolt gun, you could set back a .308 barrel by trimming the chamber end off some and cut a new chamber, re-thread and then re=head space. With a Handi rifle that would not be possible. You could "stub" a .308 barrel in and cut a new chamber for the Blackout case.

Good Shooting and Good Luck


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Offline Jason F

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Re: could this work for the blackout
« Reply #4 on: June 25, 2012, 01:37:51 AM »
I dont know the answer i am guessing, when i said yes i just meant the brass was shorter on the blackout than the 223.
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Offline Jason F

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Re: could this work for the blackout
« Reply #5 on: June 25, 2012, 02:00:15 AM »
It definately wouldn't clean up whole chamber but that shouldnt matter since you neck up 223 brass. Wouldnt the reamer just cut a new neck and throat since the body of brass is the same.
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Offline LaOtto222

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Re: could this work for the blackout
« Reply #6 on: June 25, 2012, 02:28:00 AM »
I was talking about a 300 Blackout (based on a 221 Fireball case), which I assumed you were. If you were going to take a 223 barrel and rebore it to .308, then expand the mouth of a 223 case, it should work. I am not real sure with the how much , if any damage is done to the shoulder area. I am not sure what it would be called, maybe a 300 Jason?

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Offline Jason F

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Re: could this work for the blackout
« Reply #7 on: June 25, 2012, 02:38:17 AM »
I thought the 300 blackout was a shortened and neck expanded 223 brass. I am the one that is confused now
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Offline twoshooter

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Re: could this work for the blackout
« Reply #8 on: June 25, 2012, 02:47:52 AM »
No, the Blackout is on a 221 case, which is a shortened 222 case. The 223 is a 222MAG case that was modified and given a slightly different shoulder and a shortened neck. Remember our discussions here, you can also make Blackouts from 357 brass. The 30/223 would just about be a 7.62 x39. There are 2 factions that would like to see the Blackout - those that want a subsonic round that could be silenced, and those of us who would use it as a 30/357 and substitute for a 32/20 type round.
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Offline LaOtto222

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Re: could this work for the blackout
« Reply #9 on: June 25, 2012, 02:51:03 AM »
Look at the link I provided you here. If that does not work, do a search of 300 Blackout. It really is based on the 221 Fireball case. BTW, that is why people were looking at the 22 Hornet for a rebore. - the 22 Hornet case is smaller than the 221 Fireball - same length, but smaller in diameter.

http://en.wikipedia.org/wiki/300_AAC_Blackout_%287.62%C3%9735mm%29


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Offline Jason F

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Re: could this work for the blackout
« Reply #10 on: June 25, 2012, 02:51:09 AM »
Wikipedia says 221 fireball/223 for the 300 blackout ,thats why i thought a rebored 223 barrel would be perfect
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Offline LaOtto222

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Re: could this work for the blackout
« Reply #11 on: June 25, 2012, 03:03:31 AM »
The 221 can be made from a 223 case that is shortened and the shoulder moved back to 221 Fireball size. They mention the 223, because you do not have to expand the mouth of the case of a shortened 223 case when forming a 300 Blackout. However, I am not sure about truning the neck down when using a 223 case.

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Offline quickdtoo

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Re: could this work for the blackout
« Reply #12 on: June 25, 2012, 03:53:48 AM »
Sorry Jason, it won't work, the body diameter of the 223 is too big to clean up as has been said, a Hornet barrel would work tho, 4D has a floating pilot reamer, check with JES to see what twist he can do.

Tim

http://www.saami.org/PubResources/CC_Drawings/Rifle/300%20AAC%20Blackout.pdf

http://www.saami.org/PubResources/CC_Drawings/Rifle/223%20Remington.pdf
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Offline ibgp3

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Re: could this work for the blackout
« Reply #13 on: June 25, 2012, 08:57:08 AM »
A .223 reamed to .30 would need to have a neck and throat cut, then it would be a .30x223, sometimes called a .30 silhouette. As has been said several times in this thread it would be using a longer case than a Whisper/Blackout.





223...6mmX223...25X223....6.5mmx223...7mmx223....30x223...
   (Shoulders all the same)

300BLK(3)...223...7.62x39
300BLK case is much shorter than the .223




Has JES started cutting smaller bores? Last I checked, he said he didn't cut less than either .338 or .358.
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Offline quickdtoo

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Re: could this work for the blackout
« Reply #14 on: June 25, 2012, 09:34:11 AM »
Quote from: ibgp3 on June 25, 2012, 08:57:08 AM
Has JES started cutting smaller bores? Last I checked, he said he didn't cut less than either .338 or .358.

I dunno, you'd have to check with him, his rebore page says * Currently we are setup to rebore .223 & up** , but may mean to .338" or .358" and bigger. I've not inquired about any "small" bores like .30 cal!  ;D

Tim

http://www.35caliber.com/2.html
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