EPR readout isnt very accurate on high bypass engines. It worked wonderful on the old md80. But it was useless on the md 90 with RR engine.
On the 321 our instructor told us to use the fuel flow gauge. Set it at 1200 kphr and you are fine. Best tip i ever got! Never had less than 1000 or more than 1400, very comfortable.
Find out what the figure is on the 330 and stick to it
