I have had intermittent dalliances with the 41 Magnum over the years. I have only two moulds in the caliber--the first was a 240 grain Lee, which shot OK in a couple of 41s that I and friends have owned. 10+ years later I ran onto a NIB Lyman #410032, a plain-based SWC with a small-meplat nose that fits top punch #429. It is otherwise very Keith-like, weighing 212 grains in 92/6/2 and it shoots better by accident than that Lee monster shoots on purpose.
My favorite trait of the 41 Magnum has been the makers' close adherence to dimensional standards in throats and grooves. Both Ruger and S&W get the throats RIGHT--only a few of the 100+ 41 Magnum throats I have pin-gauged would pass a .411" (minus), and they all passed a .410". I have always sized my 41 Magnum castings at .411", and could likely size at .410" without any trouble.