There was a .41 S&W cartridge!

This basically never made it out of the experimental stage sometime in the 1890s. Basically it was similar to .41 Long Colt with an inside lubricated bullet aprox. .386 diameter as the later .41 LC with the inside lubricated hollow-base bullet. The case was slightly shorter and had a larger rim than the Colt round. Only two revolvers are known to have been chambered for it, both #3 top-breaks.

Since there were only two guns it is highly unlikely Lyman made dies for this cartridge. They are probably for .41 Magnum.