I've read everything I could find on this exact subject. I found the following link to be helpful.

Use of Magnum Loads in S&W Model 19 and Other K-Frame Magnums

The model 19 is the best revolver S&W ever made.

It is the perfect size for the perfect caliber.

It is in my opinion, the revolver. The quintessential revolver.

That being said it was always designed to practice with .38 and to carry with .357. Everything has its inherent limitations, the model 19 is no exception, that doesn't mean it is not the best revolver S&W produced. This is not a design flaw, it was an intentional compromise, and the result is the perfect S&W for its intended purpose.