educating the hands

As of late I've been trying to take my hands to the ball from the top of the swing to follow thru. Wlith short pitches and even short irons this is working fine. As I make my way to the mid-irons with the same action,I am hitting big pushes. Any suggestions ?

If the door doesn't shut correctly, check the hinge

is the left wrist flat at impact? It may be arched which could lead to a push.