Gentlemen, I am just not a 357 Mag kind of guy. For me it has to be either a 1911 in 45 ACP or a S&W Revolver in 44 Mag, on duty or off duty, and the same now that I am retired.
IMHO the best way to conceal a handgun in civilian clothing is to use an inside the pants holster, now usually termed IWB, [inside the waistband].
I have been using this method since before I got out of high school in 1970.
Back then it was called "Mexican Carry", no holster was involved.
The Milt Sparks Summer Special [and others like it] are IMHO, the best, most concealable way to carry a handgun.
However, here is what you MUST DO. You MUST buy ALL of your pants 2" bigger in the waist. I have
been doing that since before I graduated High School. I am wearing a Milt Sparks Summer Special with a 1911 in 45 ACP as I type this...
As to revolver barrel length. I have used and carried a 4" Mod 29, in a Milt Sparks Summer Special quite a bit. I just never saw the need to get a 44 Mag with a barrel shorter than 4", as the barrel is inside your pants. I have also carried a 6.5" 44 Mag inside the pants quite a bit as well...
I also carried a 6.5" and later a 6" Mod 25 in 45 ACP as a Duty,and off duty gun, when my Dept banned the BIG Magnums. I REALLY like the S&W 45 ACP/AR revolvers.
So a few years ago I got a S&W Mod 325 Night Guard in 45 ACP/45AR from a good buddy. Well I LOVE this "little" revolver. I keep it under my pillow EVERY night.
It shoots great, and I even carried it to Town a couple of times as my Primary...
BUT, I just cannot shoot it at a distance, as well as a 4" revolver, so I must say, I do not feel comfortable with it as a Primary. As I live in the country I must be prepared for longer distances shots.
By the same token I would not carry a 1911 Officers Model or an Agent as a primary. My limit is a Colt Commander or a Wilson Combat Compact in 45 ACP or a 4" S&W in 44 Mag, or if I had one a 4" S&W in 45 ACP.
However, those shorter barreled 1911's or S&W N frames make a GREAT No2.
I would like to have a 2" or 2.5" 44 Mag Snubby. I would use it as a No.2 while on hunting road trips. I just cannot decide if I want the steel frame or an Airweight...