That must be a design change. Mine may simply be older, but it has no taper. Where the taper is useful is when you have a slight dent in a case mouth that needs to be fed over it. The one you have, at .224" at the top actually seems like it should be leaving case mouths on the loose side, though if the measurement is by caliper rather than micrometer it isn't uncommon for them to be off a thousandth.
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Last edited by Unclenick; August 3, 2011 at 08:57 AM.