I am from Sri Lanka. Northern Sri Lanka is in UTM Zone 44. If the data been collected in UTM Zone 44N and If I (or someone) convert it to Kandawala Sri Lankan Grid (Available in ArcGIS 10.1 as Projected Coordinate Systems -> National Grids -> Asia -> Kandawala Sri Lanka Grid) there seems to be shifting around 200 meters on the east. However if I use DNR GPS software from DNRGPS Application: Minnesota DNR load the shape file then if I set (from the DNR GPS) the file -> Set Projections -> Datum as Kandawala and Projection as Sri Lankan Grid only few meter difference which is acceptable. I have verfied this with 2 Garmin GPS one set to UTM Zone 44n and other set to Sri Lankan Grid . I shall be thankful if I can sort out the issue in ArcGIS.