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Old Yesterday, 10:29 AM   #1
Catpop
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Join Date: December 29, 2012
Location: Coastal NC
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.222 Rem rechambered to .223

I've got a chance at a used 721 Rem in 222.
Question: Can a .222 Rem be rechambered to .223 using a finishing die only (not barrel setback). It looks like it can, but I wanted the threads opinion/experience. I'm not sure if the difference of the shoulder will be resolved by the extra length of the case body.
Please don't respond with "WHY". I know the 222 is a great cartridge, just don't need another caliber to deal with.
thanks, catpop
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Old Yesterday, 12:05 PM   #2
MachIVshooter
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I wouldn't.

.222 has a shoulder that is .003" wider and .174 further back, and the .223 case has a .84* total taper (.42* per side); you'd end up with a pretty good step in the chamber
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Old Yesterday, 12:07 PM   #3
rcmodel
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Yes, I think it can.

But the problem you will run into is the rifling twist rate.

The rifle is actually a Model 722 if it is a factory chambered .222.
And it has 1/14 rifling twist, which is to slow to stabilize much over 50 grain Spitzer bullets.

Typical .223 bullets weights could not be used in it.

rc
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Old Yesterday, 01:58 PM   #4
Catpop
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Thanks rc, I hadn't even thought of the twist! I need to do a little more research.
Yuz guys is great!
Catpop
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Old Yesterday, 07:54 PM   #5
Kp321
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Join Date: July 12, 2012
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It will work, I did several a few years back. They worked well with the 55 gr bullets that were all that was available then. I personally have three 222's that won't be re chambered. Nothing wrong with the 222 and I have scads of brass.
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