Hmmmm....veeery interesting. Other than being a plain-base (rather than GC) design, that sample boolit looks pretty much identical to one from a "semi-custom" mould I had cut by NEI back in the early 1980s for metallic silhouette shooting. Boolit from my mould dropped at 232 gr. from a ww/lino alloy and weighed out at 238 gr w/lube and GC. Guess my idea was just bit ahead of it's time.
Bill