Going back, let the headcover fall
DON’T WORRY ABOUT PRECISE DISTANCES WHEN HITTING RANGE BALLS. THEY’RE ALL DIFFERENT, SO DISTANCE CAN VARY BY 10-15 METRES.
When I walk the range, I often see golfers swinging with a headcover under one arm to stay “connected.” That might be a good drill for a tour player who already produces a lot of speed, but it’s too restricting for most golfers.
I’d bet you need more width on the backswing – and more speed at impact – so try this drill instead. Put a headcover under your right arm and swing so that the headcover drops behind you when your arms get waist high. This will promote a wider arc and set up the correct downswing sequence.