Hi Rich,
You also need to modify the axis origin as by default numbering starts from 0 and not from the view range begin value:
((NLinearScaleConfigurator)chart.Axis(StandardAxis.PrimaryY).ScaleConfigurator).UseOrigin = true;
((NLinearScaleConfigurator)chart.Axis(StandardAxis.PrimaryY).ScaleConfigurator).Origin = 350;