High Romeyo,
For making your 338 br cases from 308 cases, try the following method:
Full lenght size the 308 cases in a 338 br dies with out the expender.
Then trim down (with a lathe or dremel first then case trimer, maybe with a .300 pilot at first because of the neck thickness).
Then you can use a K&m expender back to 338 that will make the neck snug fit on the K&M 338 pilot of their neck turning device.
Once that is done, you can load straight away.
I use that method for my 300 whisper brass with great results.
Good luck
ND
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