586 -vs- 27

The L frame should have no problem eating a steady diet of full house 357 magnum loads. I love the GP100 but I doubt it's any stronger than a forged L frame S&W.
 
Main difference beside size and weight is the 28 will eat a steady diet of full house old school 357mags the *86 series will not. Or you could be a gp100 ruger.

I think your mistaken on the steady diet of 357 load in a 586/686. It was designed to handle full power 357 loads with out damage to the cone or any other part.
 
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