In my experience S&W 3rd Generation pistols are indeed very durable, in fact I'd say they were as close to being overbuilt as anything made today. They really don't seem to want to wear out. Of course the reason is pretty obvious if you look at an S&W slide or fame next to a Colt 1911. There's just way more metal on the S&W. In fact the .45 and 10mm Smiths make a Colt look absolutely frail by comparison. The same goes for the BHP next to a 59xx.
I just had a BHP built by Ted Yost and he sights-in with, and recommends, 115gn standard pressure loads. There's even a caution about 124gn; and you can forget about +P or +P+ according to Ted! Now in fairness I think he anticipates anyone who goes to the expense of having a BHP built is gonna be putting a lot of rounds through it, and Hi-Powers have been made for so long there are likely several variations with differing degrees of durability, and any good gunsmith wants to have his wares last with as few problems as possible; but that kind of concern is a far cry from how I treat my 3rd Gen. S&Ws.
My Smiths eat anything I feed 'em, +P, +P+, 124, 147, anything! And we all know the same basic design is capable of digesting .40 S&W as well. In fact I have a 4043 with a bar-sto .357 Sig barrel, and believe me those rounds are pretty zippy, but again it's no problemo.
Of course the down-side to all this strength is the extra metal you have to tote around, as well as the aesthetic trade off when compared to the more refined looks of the Hi-Power or 1911 (IMO). But then I'm from the old days before Herr Glock brought ugliness in firearms to a whole new level.
/B