Going through some of my Grandpa's stuff, I came across a sizing die for a cartridge I can find no information on. As he was killed in the early 80s, this die would have to be from an earlier time obviously. Have any of you encountered a .375-405? Presumably based on the 405 Win. Guessing it might have potential to be a 375H&H or Flanged, in a lever gun? As he had nothing chambered in this, odds are good he was reloading for someone he knew (he did quite a bit of that).
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