two ways one is called a collett puller the other is an inertial bullet puller.
I use the inertial, as it does not damage either the brass or the bullet. You simply put the bullete in the long-handeled puller bullet pointing down (It looks like a big hammer). Whack the puller down on teh ground or a sturdy bench) the forward momentun causes the bullet to pop right out of the brass, dumping the powder behind and on top of the bullet. Open up teh gizm, pour the powder and bullet out, take the primed brass out of the puller. All of the components are fine and ready to reload.
JeffVN