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The water method will work if you size the cases w/o the expander/decap stem, of course, then fill the cases with water, adding a little detergent to prevent bubbles from sticking, and run the cases through a Lyman "M" die of the right size while keeping the case as full of water as possible. Plastic loading trays in a tub work great.
Its best to have a dedicated press for this and to use WD-40 to prevent rust after the process is over.
This also detects case defects like leaking primers and splits.
Priming is best done manually as most Berdans don't feed well due to dimensional differences. Standard primer flip trays actually work better.
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