EDC is a j frame air weight 38+p but occasionally I carry a high standard D101 in 22mag. Speer makes a short barrel gold dot 22 mag ammo. I don't know how much better expansion it gives over my CCI's but I'm gonna try em out.
I personally carry a 40 but would feel comfortable with a 9 mm but anything that goes boom is gonna be sufficient... Bad guys usually don't stick around to see what caliber u went with...
Flame all you want, but my P32 in the pocket beats your .45 at home in the sock drawer every day of the week.