A friend of mine has one and he won't shoot it unless he absolutly has to. One time when we were hunting, he told me that he hoped he didn't see anything to shoot at. He shoots it one time before season to see if it is still sighted in then rubs his shoulder for ten minutes. BUT it kills things dead.
As far as range goes, be sure to salt the bullet so it will preserve the meat while you hike out to the kill.