40 s&w, 45 acp, or 9mm? Also how many rounds should it hold? it will be by my bedside at all times so it will also serve as my get up and go emergency pistol to get to point a to point b if an emergency like a hurricane or something were to happen so what size should it be? A Full duty size? Compact? Sub compact? i live in condo/apartment kinda house. All of my neighbors houses are connected from left to right if i where to cut a hole in the dry wall id probably be able to see my neighbors. the walls are not thick at all. i do not want to over penetrate, which pistol caliber would be best to use? Right now im thinking a 45 acp with hollow point ammo so atleast the bullet will open up and slow down on contact. My primary would be a 12 guage loaded with.. Im not sure yet haha but can anyone share some input or advice? Please and thank you!