Bravo on deciding to keep that beautiful revolver in original finish! That 4" barrel allows full velocity out of the .357 loads and as such becomes one of the most formidable handguns around for self defense. The old Federal Hydrashok 125 gn. jacketed hollowpoint had a one-stop, actual gun fight percentage of at least 97%. Gosh, it has been a while since I checked the historical number . . . maybe higher.
I'm really into wheelguns too, and my concealed, all-the-time pocket gun eventually shrunk to a S&W Airweight snubbie . . . 5 shot, .38 Spl. Why? The weight is so negligible that sometimes I have to pat my pocket to make sure it is there. A handgun that compact and light is the only kind you'll probably have on you when trouble is suddenly in your face.
Yes, they make 'em these days in .357 but the lightweight gun with that energy load becomes a real handful to shoot well, and recovery times between rounds gets slower at speed, as does accuracy.
I do NOT recommend going AirLite in weight. The little J-frames made like this are brutal to shoot and thus don't lead to practice . . . only to inducing flinch to recoil.
I've got handguns a little heavier than and Airweight, such as a nice Kimber Ultra CDP "officer's" sized 1911, but it can't conceal as easy as that Airweight. Heck, neither can a subnosed K-frame (I've had those too).
Hope this helps.