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reforming 338 Lapua

 
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  #1  
Old 07-09-2008, 04:25 PM
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reforming 338 Lapua

Do any of you guys have any experience or advise on reforming 338 Lapua to 7mm Rem mag? Headspacing is off the shoulder

Thanks
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Old 07-09-2008, 04:55 PM
KRP KRP is offline
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Somewhere in this process you are going to have to shrink the case head ~.050" and swage a belt onto it. Can't be done, if you try it I would like to hear the details.
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Old 07-09-2008, 05:28 PM
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When the cartridge is headspaced on the shoulder no belt is necessary.
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Old 07-09-2008, 06:17 PM
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What KRP is saying - it can't be done.

The case head diameters are 2 different sizes.

0.588" for the .338LM. The parent case is the .416 Rigby.

0.532" for the 7mm Rem Mag. This was a propriatary case from Remington.

Also the .338LM is a beltless case.
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Old 07-09-2008, 06:20 PM
KRP KRP is offline
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The 7 RemMag has a belt, regardless of whether you headspace off the shoulder the case has a belt and the chamber is cut for a belt.
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Old 07-09-2008, 07:13 PM
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I did not come up with this idea, I read a semi-detailed description of the process some months on one of the reloading forums and can't find it now. I was just trying to see if anyone else had done this.
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  #7  
Old 07-09-2008, 07:45 PM
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Quote:
Originally Posted by runningw View Post
I did not come up with this idea, I read a semi-detailed description of the process some months on one of the reloading forums and can't find it now. I was just trying to see if anyone else had done this.
Could it have been a 7mm-338LM?

In other words a.338LM necked down to 7mm. The .338LM has also been necked down to.30 cal.
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