RE: Glock Help
I think they are more worried (or at least were when they first came out) about someone using "hot" reloads and having the frame break and getting that slide in the face. Since they have only a small amount of steel re-enforcement in that area, you have to wonder if that was a problem they noticed in the R&D phases of it's developement.
And you are right, I shot some soft lead bullets in a model 23 one time. Took me forever to get that barrel clean. I wound up forcing a 12 gauge brush through it (.40 caliber) and that finally did the trick.