Programming end points
Are you using the Hitec programmer?
You can program the servos for the maximum travel available (up to 90 degrees per side, all other servos max out at 60 degrees) to the surface, dependent upon the servo arm and control link setup you have.
I program mine in a setup fixture or jig for center and end point. The fixture has mounts for the servo and then I have a control arm with a six inch pointer which indicates where the servo is at. An eight inch degree wheel is mounted to the fixture.