I'm a #4 buck guy myself.
They leave the barrel about a 100 FPS faster than a .22, maybe 300 FPS faster than a .22 pistol. So ask yourself this, if someone emptied 2 1/2 magazines from a .22 simi auto pistol at 25 yards into a bad guys chest, do you think it would have "stopping power" ?
If the buckshot does not kill him, the surgeon will when he has to pull out two dozen pellets instead of 7 or 8.


MOLON LABE