I hadn't read about KaBooms until after I purchased my Glock 20 this past Monday. I had a similar event with my 10mm on Thursday, with one factory load casing actually peeling out a little strip of brass. Yikes. I'm told on this forum that I just need to avoid lead bullets, which is what I was using. I've since seen similar precautions. That doesn't sound like the same problem you're experiencing, however.