Yea, speaking from experience, that is normal.  The shock struts on the main landing gear of pretty much all U.S. 130's are "soft" shock struts.  Soft meaning that the nitrogen or air pressure inside the strut is lower than most aircraft.  My coworkers and I have had to go out numerous times to jump up and down on a wing to try to get the strut to settle because a pilot taxied in too quick while turning and then complained about the airplane needing the struts serviced!