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Minnie did the Hollow Base – undersized black powder bullets circa 1860’s
Wilkes or SAECO H-B or Henninger-Barnes driving bands
Though the orginal Wilkes check system years ago used a punch set up to knock out the bottom of a standard 30 cal gas check, which left a shoulder at each driving band, to anchor it to the boolit.
Corbin “Base Guards”
Could try different alloy – like Zinc?
Jim Harvey’s Prot-X-Bore washers