I think it's a good thing to be suspicious when they can adjust certain parameters without you knowing.
Using the FlightScope Optimizer, I got about 255 carry. 13 degree launch angle would be 248 carry. 155 ball speed at 13 degrees is 260 yards.
I'm totally skeptical about these flight simulators at Golfsmith and Dick's. None have told me the truth. Some tell me what I "want" to hear, and others tell me I'm a total wuss.
They report a range of carry distances from 190 yards to 285 yards, where my average approximate course distances are 230 carry on flat ground. So, I suppose they are accurate with +55/-40 yards accuracy?
Flightscope or Trakman might be more accurate, but these are not provided at Golfsmith nor Dick's.