Checking the net, moon clips are available for the 610 S&W 10mm revolver so maybe that is the way to go for the 40s. The Lyman and Speer manuals only show 231 rather than HP-38, but based on the 231 data the questionable loads were borderline but none were exact to what I had been using.
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Ouch, the dreaded "M-1 thumb", you just know it will happen eventually, so why not do it now and get it over with??
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