Just FYI: an older times gun writer named Walt Rauch took one of the older none +P rated J frames and had every part disassembled, examined and measured. He then proceeded to pound that old J frame with a multitude of +P rounds by various makers. After hundreds of +P rounds that gun was once again disassembled, examined and measured. Guess what NO accelerated wear or stretching etc... was found.
I do shoot +p in all my .38 Special guns. I do not shoot a lot of it because it is not fun for me to do so.
Added:
Walt Rauch received a BS degree from Carnegie Tech and completed service as a Special Agent in U.S. Army Intelligence. Rauch was a U.S. Secret Service Special Agent and a Philadelphia, Pa., Warrant Unit Investigator. He now operates a consulting company for defense-weapon and tactical training. Rauch & Company services include expert witness testimony on firearms use and tactics.
Rauch is also a writer and lecturer in the firearms field. He’s published in national and international publications including InterMedia’s Handguns, several Harris Publications specialty magazines, Police and Security News and Cibles (France). He is the author of a book on self-defense, Real-World Survival! What Has Worked For Me, as well as Practically Speaking, a comprehensive guide to IDPA defensive pistol shooting.