I should know enough to let sleeping Bubbas lay, but here goes. Zrexpilot, you kinda loose credibility when you speak of an event of twenty years ago, but don't know what ammunition is currently on the market. Yes, CCI's Stingers are an expanding bullet. No, they are not explosive. Yes, they are still currently on the market.
I realize that this feller don't have no qualifications, except as the head of Forensics Department at a major university, but try reading his letter anyway. The writer outlines the differences between expanding, pre-fragmented, and explosive bullets rather neatly. He is a Brit, so some of his terminology is a bit different. Go to:
http://jcp.bmjjournals.com/cgi/eletters/56/4/254