I already got the 4" .357 niche covered with my sweet Ruger Security Six I've had since like '92
But for somebody that doesn't yet have a revolver, it doesn't get much better than a .357 4" as far as all-purpose.
You go to the range and slap some .38spl in there, perfect weapon to start some new shooters out with.
Out in the field? Some hot loads with lead-free and a decent rest and you're droppin' game.