Mark,
Somewhere in my notes, is the patent number and description of your cleaner. If memory serves me right (and it may not) I believe yours as originally used to clean brass shells after firing. That's why the shell has the has the deeper taper to fit into the shell mouth and the scraper piece has the bristles in the center for cleaning bump that the primer fits in. Where as Bruces and Jeffs items are to clean shotgun bores.
Jack Kuzepski
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