“Firing any gun indoors without hearing protection is going to be disturbing. I have not seen any studies, but I would think that the sharper “crack” of a rifle or handgun would be more disadvantages than the lower velocity bark of a shotgun. By the way, like your screen name, bought an Armscorp .38 earlier this year.”
I think the only sources on the subject would be combat veterans who were involved in urban warfare. There apparently being no studies on the matter.
I bought my RIA M200 revolver 3 years ago and I’m quite happy with it. An economical gun that does the job.
I bought the same model for my wife about 15 years ago.
The fit, finish, and lockup are excellent.