Everyone should have at least one 6" .357. But it's true that a 4" will do just about anything a 6" will do with all but the hottest loads. You could split the differance and go with 5", there are some Stocking Dealer Specials out there, and it is one that S&W has hinted that they are going to produce after Shot Show. If you are looking at target shooting the longer sight radius and heft of a 6" is helpful, things that work againest it as a carry gun.