I had a 6" model 19 back in the 80s. Fine revolver. Eventually I decided I was done with the .357 round, and sold or traded it (I no longer recall which). I even gave away (to a good friend) all my brass. I kept the dies (I aways keep the dies,
).
A couple years later at a show, I run across a 6" model 28, NIB. Now, my Dad had a 6" M28 when I was a kid, and that was the "cannon" in the house. SO, that model 28 went home with me. And I got to discover what a diamond in the rough (and not too rough) these guns really are. That gun has the target hammer and target trigger, which was not the factory standard for the M28, but makes the gun a joy to shoot even more than the regular ones.
Equal in all respects to the model 27, save sights and finish, but costing a significant amount less, the M28 is the best value of the old N frame guns. I even prefer the satin blue to the high luster blue of the top of the line guns.
The model 28 handles the hottest safe .357 Magnum loads, including the equivalent of the original factory magnum ammo. It handles loads that are too hot for K frames, or anything smaller.
The model 19 was just what Bill Jordan envisioned when he wanted a duty revolver that was easier to carry all day than the big Smiths, yet would handle occassional use of .357 Mag ammo. And this worked pretty well for a couple of decades. A quick check of a 1974 Gun Digest says that a 4" Model 19 has a weight of 35oz. A 6" Model 27 weighs 44oz. And the 19 was $150, the 27 was $175 msrp. I can remember about that time the model 28 in a local shop (new) was $140. And the Colt Trooper MkIII was $188!
However, with the introduction of the hot 125gr "manstoppers", and a number of people feeding their 19s lots of hot ammo, problems began showing up in the 19s.
S&W's "replacement" for the K frame .357 was the L frame, 586 & 686 guns. A slightly larger frame & cylinder than the K frame, but smaller and lighter than the N frame.
This was a fine thing, and would have resulted in a revolver much more durable (meaning longevity with hot magnum loads), and yet just slightly heavier than the K frame M19. However, S&W didn't stop there. They paired the L frame with a heavy, full underlug barrel.
What this did was to produce a gun slightly smaller than the M27/28 N frames, but weighing virtually as much. And the full underlug gives the 586/686 series a very muzzle heavy feel. Some people like it, some don't. I've heard it claimed that a muzzle heavy gun is faster to get back on target, but I can say if that's true or not, everyone shoots a bit differently. I do know that they don't balance in my hand the way I am used to from all my other revolvers, and I don't really like that much.
Its getting to be a moot point these days, as the .357 market has mostly swung to the opposite ends. People either want a big heavy rugged gun (to last and damp recoil) or they want an ultra light pocket size carry gun, to be carried a lot, and shot only a little.
With the police having gone to semiautos, demand for a duty size (medium size) .357 isn't nearly what it was.