Measuring

• Score every ball, including the bad ones, where it stops — not where it lands. A rangefinder is easiest; a consistent pace will do.
• The rings are a fixed distance from the hole: 8%, 16% and 28% of your shot.

If you are using a launch monitor or radar

• Use it to find the club's distance: ten full swings, carry, averaged. Use carry, not total.
• It cannot score Measured mode — proximity is measured from the hole once the ball has stopped.
• Indoors, or with no resting place you can see, use Range-mat with the carry numbers.

If you are on a range mat with no way to measure

• Choose Range-mat on the card. It gives two marker distances, 8% short and 8% long of your number — from 150 yards, 138 and 162.
• Between the markers scores; short or long does not. Judge left and right by eye.
• It keeps your history but gives no benchmark gap or strokes gained: those need feet from the hole.

Retesting

• Same level, same distance, same ball and same club every retest. Mid (7-iron) is the core assessment; Easier and Advanced are for development.
• One run is a snapshot; two or three averaged is a standard.

Benchmark

• The benchmark is how close golfers of your handicap finish with the same club, as a share of that club’s distance (Shot Scope data: approach proximity by club against performance-average club distance).
• 7-iron: 12.7% at scratch, 17.3% at 5, 20.9% at 10, 31.8% at 15, 37.9% at 20, 40.4% at 25. The 9-iron and 5-iron levels use their own club rows.
• As a share, it scales to your own distance, so it works whatever you hit the club.
• Strokes gained is against the tour baseline and estimated from the ring each ball finished in.

Equipment

• One iron · 20 balls · a mark at your distance · rangefinder or a consistent pace, or two markers on the range. No specialist technology is required.