RE: .41 mag VS. 10 MM
 

The 10mm can be a powerful cartridge, depending on load. A shortened and downloaded version became the 40 S&W, which is a fine round but not in the same class as a 10mm or 41. I'm not sure how it compares to a 41Mag, but a quick look at a reloading manual should give you a general idea of how the two compare.