why not many revolvers in 9mm?
1. the ones that dont use moonclips are well not trusted. the mechanisms are able to be more affected by fouling
2. if using a moonclip the people who spent a few thousand dollars on shooting courses will be unhappy that they are unable to eject individual empties to top off the chamber.
3. the currently made 9mm come in SHORT barrels. barrel length should not be the same as a micro desert eagle .380 pocket pistol.
4. a similar revolver in .357 is hard to beat. reloading does let you get down to 9mm level