Think about it. After reading questions on this and other boards as I do. Do I need a cannon .(45)or a mouse gun (.22) for self defense, double stack , most accurate ?.REALITY Most self defenseshootings are 3to 7 feet and shoot once or empty the gun. Any further than that and it's hard to prove a threat. My belief is get a good double action on the first round. Dao or da/sa in a semi is the answere. A good revolver would also work. The key is no safties. Who wants to be rolling on the ground with a thug and need to be fumbling with a safety. A good holster keeps the boom stick covered and keeps the weapon from firing. Buy a good holster too many people buy a 700 dollar gun and a 15 dollar generic holster.
Carry the largest caliber that you can handle safely.(you are responslble for your missed shots.) We are not shooting great distances as some LEOS or through windshields or doors. In fact most derringers would do. The need for double stack mags is probably non existant as a CIVILIAN. I carried a AMT backup .45 5 plus 1 in the pipe butnow carry a kahr pm .45 that is 5 plus one. Switched to kahr only because the trigger reach is better for me. Get what works for YOU a .380 carried is better than a .45 left home. Comfort means better acuracy. My .45s are less than the size of most 9's.DO YOUR HOMEWORK! Think reality for your defense gun. Get the smallest you are comfortable with( size wise) withthe most caliber you can hamdle .