Boy, I've heard some bad things about WD-40 as far as rust preventative. I use it all the time for other things but not to stop rusting. Anyways, the guns are stored vertical with muzzles down. It's nice to know others have had this problem- wonder if the chamber on the left side is a tad bigger allowing burnt powder to escape around it? Have to bring home from the club my dial indicator and check them. Mark, I save that can of Kroil you gave me for nasty stuff and use Rem Oil on the bores and breech face.
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Paul Harm
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