What part of your body controls your swing?  Too many golfers struggle with consistency because their hands (and arms) are too involved in their golf swing.

 A swing controlled by the hands and arms depends too much on the finer, smaller muscles. Swinging on plane becomes difficult. Consistency of ball striking is impossible. And it's much more difficult to create power.

You need to let the large muscles control the swing to create consistency and power.

On the range, feel what part of your body starts your backswing and what part starts your downswing. Controlling the first movement of both the backswing and downswing with the correct part of your body can be a big pay-off for most of you.