19th century 38 caliber cartridges de mystified

This week’s video is called “De-Mystifying 19th century .38 caliber cartridges.”
It will provide all the poop on the evolution of the .38 Colt lineage of cartridges, which led to today’s .357 Mag.
It will also explain why .38 S&W doesn’t interchange with any other cartridge, and became an evolutionary dead end.
I’ll talk about why the “.38 S&W Special” confuses people into thinking it is related to the .38 S&W, when it is actually derived directly from the .38 Long Colt.
Hopefully some folks will find it interesting, but, if I just made it more confusing, let me know in the comments.
Mike Beliveau links
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