In "Shooting Times" back in 1997, there was an article in which the author and his sidekick tried to destroy a couple of lightweight S&W revolvers by shooting .38+P ammo. They put 2,500 rounds of various +P through a model 38 Bodyguard and a similar amount through another Smith airweight that I can't recall at the moment. They checked both guns for wear and accuracy every 500 rounds. Neither gun blew up, nor, according to the authors, did either loosen up to any degree or have its accuracy go down the drain. According to the report, most of the wear and tear occurred to the shooters' hands before they gave up and switched to much larger rubber grips.