a coupla squirrels, a bird or three and some ground hogs. (they usually require more than one piece of driveway to get the job done)
It is just like shooting a recurve. just practice and eventually you will be a helluva shot. the comparisons with bows ae pretty good. they even make a slingshot with sight pins now.
I was never withought my trusty crossman "wristrocket" when I was growing up, still have one actually. we always lusted after the ones with the red "Power bands" hahah