.22LR as a defense caliber/sidearm....
The "hey, why don't people use the .22LR round for CCW or protection?" posts come up often on message boards.
There are a few practical reasons
not to use a .22LR as a carry gun. Poor ballistics, lack of power, excessive force concerns, etc.
In a
real critical incident, you will need to fire the least amount of times to stop the threat. You couldn't stand over a felon shooting 5/6/9/15 times at them with a .22LR.
Some hue & cry about the "mafia" or Mossad(secret service) using .22LR suppressed pistols.
Unless you have seen to many spy movies or think a prosecutor/courtroom would buy those excuses, Id stick to a proven, larger defense caliber like a 9x19mm, .40, .45acp, .38spl, .44spl, or a .357magnum.
.22LR guns are best for small game hunting & training-marksmanship.