Does the GAC2700 UGMA and GAC2700 Agri use the same grain calibration and The GAC2500 UGMA and GAC2500 Agri?

Yes, Calibrations are transferrable between Instruments.  You can find the current calibration downloads on my webpage:  www.cornbelttesting.com  under service and support.  We also have the calibration installation instructions for the GAC2500 UGMA and GAC2700 UGMA, Please call us on the GAC2500 AGRI and GAC2700 AGRI at 866-845-6249.