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Author Topic: .223 to 222 mag re chamber  (Read 694 times)

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Offline black-tail

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.223 to 222 mag re chamber
« on: January 17, 2012, 06:05:17 AM »
Finally getting around to playing with the wife 223.  She wants to compete with me in sharpshooting events.  Yesterday I started working up two loads, a 50gr V-mad and a  36gr VG.  I checked the  throat depth and WOW  this baby has some free bore.  Wile doing a case inspection I found quite a few split necks on my cases, some were once fired and some were once reloaded(2 times fired) This got me thinking that I may have a headspace or loose neck.  So I got the bright idea that a rechamber to .222 Rem Mag may be in order.  The accuracy of this rife has been good, but has always had a difficult time extracting cases, on both factory and hand loads, split necks may be the issue.  The wife 7-08 seems to split necks too????



Any who back  on track rechamber to  Rem Mag a good idea???
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Offline otterbob

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Re: .223 to 222 mag re chamber
« Reply #1 on: January 17, 2012, 07:44:56 AM »


Check out page 14 of the SAAMI pub at :
http://www.saami.org/specifications_and_information/publications/download/206.pdf

It shows that the 222 rem mag is 50000 CUP, and the 223 rem is 52000 CUP , If I understand you correctly you want to clean up a questionable chamber/throat/leed  of the 223 with the 222 mag which in my humble opinion would be a great idea.

I would consider a hand reamer as the tool of choice but others my have a different opinion.



Otter Bob
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Offline black-tail

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Re: .223 to 222 mag re chamber
« Reply #2 on: January 17, 2012, 02:11:23 PM »
Yes, re chamber to clean up  long throat and make dead sure headspace is on.

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Offline TNBilly

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Re: .223 to 222 mag re chamber
« Reply #3 on: January 17, 2012, 02:21:05 PM »
You're only talking .090 on length and ~030 on shoulder length increase on the 222mag.  If it were mine I think I'd first do a cast of the 223 chamber and measure the headspace to find out exactly what's going on and Exactly how much it would take to correct.
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Offline TNBilly

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Re: .223 to 222 mag re chamber
« Reply #4 on: January 17, 2012, 02:29:17 PM »
Meant to but forgot to comment in the last post on the splitting neck issue.....  Only going by what information you're giving us here I'd tend to think it's a reloader or reloading issue.  Headspace issues almost always show up as split cases a little up the case from the web.  Split necks I'd tend to think are showing overworking of the necks and/or lack of proper lubing when sizing.  Are you trimming to length and properly deburring the inside and out of the necks?
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America is great because she is good, and if America ever ceases to be good, America will cease to be great.”        Alexis de Tocqueville

Offline black-tail

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Re: .223 to 222 mag re chamber
« Reply #5 on: January 22, 2012, 05:03:14 AM »
Went to the range yesterday, I used new Winchester cases, full length small base sized and loaded with either 50hr Vmax bullets or Varmint Grenades.  NO split necks, I have the brass separated and will count the reloads. Think I may have had some issues with brittle brass.  The 7-08 was all once fired R-P brass. Going to try Winchester brass next.  I have had great luck with Winchester nickel plated brass in my 280 target rifle.
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