Here is a cool utility showing different ammuntions and there stopping power based on actual shootings. The data is based on a book that I haven't read yet that can be found at http://stoppingpower.net.

http://www.handloads.com/misc/stoppingpower.asp

Lately the problem I have been having is finding the ammo I want. So let me know if you find Hydra Shock in 380 or 9mm +P+.