300 - 400 grain .412" or .413" is the original loading for projectiles I think. The Lyman # 412263 mold has been discontinued for some time. Unless a rare bird pops up on ebay, it may be near impossible to find.I doubt it…that is NOT a caliber we shot or had that I am aware of. We have/had mostly handgun caliber stuff but do you know the specs for the 405 bullet ? I am guessing .405” in diam. ?? How about weight ?
I mean, I’m sure I could look it up in one of the manuals…..but I would need the specs then I would need to look through his molds and stuff.
Looks like 2 sold in June and 2 in July on ebay. $65 - $95 each,