"... the most versatile pistol calibers are the 357 mag, and the 44 mag ..."
Ah, not quite. First, you need to read my post again. I said, "most versatile
pistol caliber," as in semi-automatic handgun or autoloader, not
revolver. I wasn't referring to wheel guns or their calibers. It's really apples & oranges to compare them anyway, in my view.
As far as magnum revolver calibers go, the .357, .41 and .44 are all accurate, excellent cartridges, but for purely anti-personnel uses the first two are probably sufficient. If I were out hiking, backpacking or camping and were likely to encounter 2-legged or 4-legged predators,
and were limited to a 6-shot revolver, then it'd be a .44 mag without thinking twice about it.
But the availability of a 15+1 10mm Glock 20, loaded with something like Texas Ammo's 200gn loads using Hornady bullets @ 1250fps/694fpe, really makes my personal need for a 6-shot magnum revolver superfluous.
'Course, that doesn't mean I don't want one.