I just got my hands on an awesome revovler but aparrently it is too powerful, how powerful is three joules?

It calculated to be about 550 fps which is about right for a Co2 pistol with that long of a barrel. The shortest barrel Wingun revolvers shot just under 400 fps. http://www.gamepod.com/fps_calculator.php

Can you explain how to do this whole math deal then? Because I'm certain that 1 joule is 328 FPS, not saying you're wrong in fact your answer does sound more reasonable, I just don't understand how to get there.

The equation is below: VARIABLES: E is Energy of the moving object (in Joules) m is Mass of the moving object (in kilograms) v is Velocity of the moving object (in meters per second)