Hello everyone, Let me start by making it clear I am not attempting to start a "caliber war", and I am fully aware the difference's between killing power, and stopping power. Still it seems a good majority of gun enthusiasts/owner's who carry a weapon for SD underestimate the stopping/killing power of a .22LR when used in a SD situation. The whole my good old .45 ACP is better than everything on earth concept, and the tiny .22 can not stop the attacker(yet I find it funny because regardless of the choice of caliber used for SD, a determined attacker can/may still kill/hurt the victim even after being stop multiple times), where as throughout history the .22LR has been proven effective at putting criminals in the ground(not always immediatly), or stopping/ending the attack. Despite all of the "bigger is better" guys out their stating "Sure it may kill later, but may not stop the perp instantly" leading to the victim being killed by the perp due to .22lr's lack of effective stopping power, their is very few stories I can find to corroborate said statement. Finally, my question is how many of you guys/girls carry a weapon chambered in .22LR as a primary carry weapon for SD? The notion I assert when carrying is, can I accurately/quickly place my rounds where I need them to be(shot placement), and finally do I feel comfortable with the weapon? My rational is both physical, and psychological: Psychological: Bigger grants more of a "security blanket" for the operater, and the intimdation effect placed on the perp. Physical: This can swing both ways, First being hit in the head(human target) with a baseball bat(1-4 lb's) swinged at 60 mph, vs a bolling ball(8-12 lbs) traveling the same speed(sure given the mass of the bolling ball is most likely going to cause more damage), but the effect will most likey result in death/incompacitation regardless.... hint on shot placement. The other is clear a bigger round can create both greater tissue/organ damage, and a larger hole causing more blood loss at a faster rate. My primary carry weapon is a Glock 19 GEN4 LEO Edition, with a backup ruger sr22. "One should show limited concern for a person carrying multiple "hand cannons", fear is for the man carrying only the .22 for his aim will almost alway be steady".