I'm thinking of taking a CCW class and buying a gun. I've read a number of articles about stopping power and number of bullets being important, but I don't know that I would carry a large handgun. What appeals to me is something small that I could easily conceal and wouldn't be that uncomfortable or bulky in some sort of shoulder holster under my coat or inside my belt. I want it to be convenient. Also, I've hurt my wrists a number of times and think a high powered gun would be difficult for me to train with much. Any suggestions on what sort of weapon I should look into, and what sort of ammo to carry in it vs. train with? I've read that lowered powered handguns can make up the difference with expensive ammunition. Is that true?