I believe that a speedloader that would feed .45 "Long" Colt rounds would also feed .410 shotshells, but I don't know for sure. I do not believe that there is a speedloader for that size cartridge in a 5-shot cylinder, anyway.
However, there is a "quick strip" available which would hold five (or six) of either cartridge. You will want the .30-30 size strip, I believe.
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