I find I carry my CCW everyday, but have yet to fire it in self defense. Thus I went with the S&W M&P340 (.357 magnum). I carry 4 .38+P and the 5th chamber has a .357 magnum. I know when to reload. I practice with reloads loaded to the .38+P level and periodically shoot a cylinder of .357 magnum short Barrel loads. As someone said the snub nose J-Frame is not an enjoyable handgun to shoot in .357 magnum, but it can be a piece of cake to always have with you.
When the number of people in institutions reaches 51%, we change sides.