Second post on this to add info only becaues you twice talk about a general purpose revolver or all-around gun.
In your original post you say it will be for target shooting, home defense, and you "want to carry it via shoulder rig in the mountains for black bear and other pesky critters". You also say hunting would be a nice bonus.
For target shooting a 6" is better (though for general range use a 4" is nice too), for home defense either is fine, and for black bear you'd be much better off with a 6". For hunting (which I know is just nice, but not a real part of your criteria) a 6" is best as well. So, for your stated use you'd be best off with a 6", though a 4" is minimally acceptable.
Now, if you intend to include concealed carry in "all around gun" then you really should go with the 4". I'd also suggest going with a used (or new if you can still find one) K-frame as it is still quite strong but lighter and more compact than the larger L-frame (586, 686, 620, 519). The .357mag K-frames are the models 65, 66, 13 and 19.