ALK;
No question that if a 25,000 PSI .38 Spl. was fired in a standard steel frame K-Frame or even J-Frame revolver it will be quite startling to the shooter, and probably painful, but it will not result in catastrophic damage to the revolver!
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but what if that load was fired in a 20,000 PSI non-steel J frame revolver.......not +P rated or ...... a weak one rated at only 18,500, without any knowledge ??

One only needs a little damage to a revolver to have bad things happen. Just a very small peace of metal in the wrong spot can be devastating.