Its quieter, and a Long .22 cal 'hollow point' bullet spreads out upon impact, so it creates a larger hole than a simple .22, another major benefit is that a .22 caliber (once it enters the body) often times bounces around inside the body causing much more damage than a heavier bullet. ripping through organs, muscles, etc.
A .22 caliber can be a devastating weapon in the right hands.
Another big plus is that you can buy bullets anywhere (without a license). because a .22 fits both a handgun and rifle which is not a Sullivan Law violation
Correct ;-)