Bingo.
Shoot a lot of normal rounds through it at the range. shoot enough hot loads so you know how they shoot and feel. Carry it with the hot loads.
I've never heard of a .38 Spl S&W, even an alloy framed ones (with the possible exception of some of the old M12s (and those may have been dead soft aluminum, not an aircraft-quality alloy) being worn out by +p rounds, although anything is possible...I can't afford to do it, and I doubt you can either.
Modern guns from reputable manufacturers are pretty well built. You can beat one to death if you try, but you are probably going to have to really try.
I have used this same principle with a number of revolvers and semi auto pistols for years, and have yet to find the flaw in the theory.
Similarly, I can take my bike to the drag strip or road race track a couple times per year...may increase wear a bit. If I did it every week...different story.
Back when I first owned alloy and scandium alloy j-frames, I also owned a steel frame M49. These days I just own and shoot my 637. Similarly, I shoot my alloy framed 1911s, and no longer need a steel framed 1911.
YMMV...but I doubt it.