I believe only the hottest .38 +P can expand a little and penetrate decently from <2" barrel.

Due to recoil & bullet pull I'd only be using standard pressure .38's. Wadcutters, SWC, or a JHP I know isnt going to expand.

Might as well use what I already have, is just as light, smaller, that i shoot well, is fun to shoot, safe to carry, double-action, will work with direct contact, and is reliable. (The .25 Beretta Bobcat)