Why do I hit the ball great during a golf lesson but fall apart on the course?

You fall apart on the course because driving range mats disguise fat shots, and hitting off flat rubber bears zero resemblance to playing real golf.

Mats lie.

On a proper iron strike, the club hits the ball first, then takes a crisp divot two inches in front of it. Commercial range mats sit on hard rubber or concrete. When you hit two inches behind the ball, the mat acts like a trampoline—bouncing the clubhead upward into the ball and turning a 40-yard chunk into an acceptable 150-yard shot.

On Saturday morning, that trampoline disappears. The leading edge digs straight into the dirt, mud flies everywhere, and your ball dribbles 30 yards into a fairway bunker.

Range practice also ignores how you actually score. You stand on a flat lie, beating ball after ball with the same club to a wide-open field with no pressure. On the course, every single lie is different. You face sidehill lies, buried lies in the rough, wind in your face, and water flanking the green.

A real craftsman teaches off natural grass and takes you onto the course for playing lessons. They watch how you think, how you manage an awkward lie, and how you handle pressure. If an instructor only watches you hit off a rubber mat, they are teaching you range golf, not real golf.

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