My first bullet of choice would be 38 special 158 grain SWC. The only problem is the lack of high capacity in revolvers. My choice of weapons, a Glock, so intermingling the two, I would be looking at a Glock 19, 9mm with 147 grain jacketed hollow points. I am not a Glock groupie, and I don't regularly shoot 9mm. I do feel that if I needed to be armed in a security situation, the G19 , 9mm would fit the bill. The Glock is simple and proven, the 9mm has come a long was in the last few years.