There is extremely little gain of terminal performance between 38+p and 357 mag out of snubbie barrel lengths. A lot more recoil, a lot more noise a lot more abuse to the gun. And very little effective velocity increase and expansion of the bullet.

I agree, if you want a 357 buy a 357. In the same vain, if you want a 9mm, buy a semi-auto or at least a gun made and rated for 9mm.

As for 9mm, Dealing with moon clips is of little advantage except for dropping the spent empties with the short sjecrion rod as the entire combined weight and gravity helps quickly remove the entire cylinder of empties. . Reloading with clips offers less advantage than a traditional speed loader. At least in my opinion.