I have, its really loud. I also know Officers that have been in shootings indoors with .357 Magnums. No one I know was ever incapacitated at the time of the event as far as the decibal level. I'm thinking a single event, where you are about to die and somebody needs shooting, would have a minimal affect on your long term hearing loss. Not that it would be a good thing.
Our troops are engaging bad guys in close quarters and inside houses in the middle east. 5.56, .308 and hand grenades. A few rounds of .357 can't be worse.
I've got hearing loss. But, I can't blame it on any one thing. 30 years of Rock and Roll, sirens, radios, Thunderflashes and shooting have all had a cumulative affect.