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Resizing 338 Excalibur

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Old 01-29-2012, 07:49 PM
Junior Member
Join Date: Oct 2009
Posts: 9
Resizing 338 Excalibur

Does anyone know if I can resize the 338 Excalibur to the 300 Pegasus? I think Graf and Sons have some 338 Excalibur brass.
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Old 01-30-2012, 12:12 AM
Gold Member
Join Date: Apr 2007
Location: ALASKA
Posts: 504
Re: Resizing 338 Excalibur

Yes, you should be able to neck down the 338 Excalibur brass to 300 Pegasus.

But...You may run into a neck clearance issue depending on the reamer used to cut your chamber, as the neck wall thickness may increase up to .002 to .003.

Can you measure the diameter of the case neck on one of your fired 300 Peg cases?

Can you measure the diameter of a case neck of a loaded 300 Peg case?

Post those two dimensions....and we'll see if this has a good chance at working in your gun....without having to neck turn the 338 Excalibur cases.
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Old 01-30-2012, 08:25 AM
Junior Member
Join Date: Oct 2009
Posts: 9
Re: Resizing 338 Excalibur

Thanks for the input. I can do all of these things.
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