The reason for inconsistent distance is left wrist breakdown. Be sure that you are transferring your weight to the left side. If you do not your weight is left on the right side and the shaft passes the hands(very bad) and you hit the ball a short distance. It is much easier to hit wedges compared to the longer irons. Do not worry about distance be concerned about impact. The left wrist should be flat or supinated and the right wrist bent. What is your typical ball flight? low, high, left, right, slice, or hook?

How well do you chip the ball where is the ball contacting the face? You can determine this by plcing a peice of tape on your clubface and then chipping balls. The ball will leave an imprint on the tape and will tell you where the ball is contacting the clubface.

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Jordy Scerbo
Golf Instructor