9-to-3 Compression Drill
🎯 Irons & ContactBeginner15 shots with a mid-iron
What it fixes: Strike quality with a shorter, controlled swing.
How to do it
- Swing arms from 9 o'clock (lead arm parallel back) to 3 o'clock (trail arm parallel through)
- Focus on a crisp strike and full body rotation, not distance
- The ball should fly about 70% of your full carry with that club
- Build up: once strikes are pure, lengthen the swing gradually
Pro tip: Quiet hands - rotation moves the club, not the wrists
Watch it in your data
This drill moves Smash factor — track it session to session with the Smash Factor guide open. A drill without a measured before/after is a feeling, not a fix: hit a baseline block, do the drill, re-measure the same block.
Why this works: the mechanics behind it are explained in Impact & Compression — The half-millisecond that IS your golf swing.