Revchuck, ever try the 41 special in that M57? If not, you might consider getting some brass and loading it up... makes for a fun, lighter load than the 41 mag and gives you more flexibility with that excellent revolver. I use the same loading dies for the 41 mag when loading the 41 special with the caveat of using a lee 41 mag factory crimp die for 41 special for that part of the loading process.
Have fun with that M57!!