I think it is just some type of exacto blade glued/imbedded into the wooden dowel. It is kind of rounded off on top like a sheep's foot blade.
He also makes crimp starters for new hulls. you can see those on the 16 ga forum, which by the way is almost as active as the Parker forums.
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"How kind it is that most of us will never know when we have fired our last shot"--Nash Buckingham
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