A J-frame is a far better choice for most SD carry than an auto. My 642 started out around 14.4 ounces and is now 12.5 ounces even with a titanium cylinder. That's five rounds in a small, lightweight package that carries easily in a pocket. The advantage to the revolver is manifold - it can be shot from inside a pocket, in full body contact, and has an extremely low malfunction potential secondary to poor handling, or external contact. A revolver can be loaded this year and still be gtg next year, plus you can easily see it's rtg! It doesn't care about nose profiles, or feed ramps, extractors, or magazines. No safety to worry about, as for reloading, just carry a second J-frame in another pocket!