Check out this article and look at the pictures of the Hornady 90gr xtp expansion. Not very impressive IMO. I carry the speer gold dots in all my .380's. This article is AWESOME and VERY informative. Scroll down to the charts and click on the small pics of the recovered projectiles to see how they did. The XTP's didnt do to bad but a couple didnt hardly expand at all. No thank you. I'll stick with the Gold Dots or the Hornady FTX Bullets which got deeper penetration.
http://www.luckygunner.com/labs/self-defense-ammo-ballistic-tests/
http://www.luckygunner.com/labs/self-defense-ammo-ballistic-tests/