To become a great ballstriker, you must groove an on-plane swing that’s powerful and repeatable. The key to doing this is developing a solid position at the top and making a smooth transition to your downswing. Below is a drill that can help you do this.
Address a ball with a 7-iron in your hand. Now make your backswing. As you get to the top, slide your right hand down to the point where the grip meets the shaft. This causes your right elbow to fold naturally and your left arm to straighten and stretch across your chest—the perfect position for your hands at the top of the swing. Repeat this exercise several times. Then make several swings using your normal grip. Keep alternating swings until they feel similar.
This drill will help you find a solid position at the top that can help you groove a repeatable- on-plane swing that produces straighter, purer shots. You might even see your shot shape change from a slice to a slight draw after a while.