Currently, I have 140gr Hornady FTX sitting in my SP101 in my holster right now. They are under "Self Defense" category on MidwasyUSA's website, but I know they are labeled as a hunting round. Hunting round in a revolver cartridge=goal of good penetration. I've shot 10 of the box and they are plenty mean. Group nice if I do my part, and are a handful in this revolver. Whenever I find another box, I'm going to pick them up to do a bit more extensive shooting tests with.
"No experience is so conductive for steady and accurate shooting as the knowledge of the impossibility to escape by speed."
-Sir Samuel Baker