The on-course gap test: find your real carry distances

Why estimated numbers rarely hold up

Ask ten golfers how far they hit a 7-iron and the answer is often their best-ever strike, downhill, downwind — with roll. A bag analysis works from typical carry: how far the ball flies on an average, acceptable strike. That's the number the gap test finds.

What you need

• A laser rangefinder, GPS watch, or a course/range with known-distance markers.
• 6–10 balls per club (range balls are fine — see the note below).
• Calm or light-wind conditions, and a quiet time of day.
• Your phone or a small notepad to record numbers.

Method 1 — the driving-range gap test (best option)

1. Warm up properly — the numbers should reflect your normal swing, not a cold one.
2. Pick one club and a target at a known distance (marker, net post, or a spot you laser).
3. Hit 6–10 balls at a normal, full-swing tempo — no hero swings.
4. Estimate where each ball lands, not where it finishes. Ignore the single best and worst ball.
5. Write down the typical carry — the middle of your cluster.
6. Repeat for every club, from wedges up to driver.

Note: range balls can fly differently from the ball you use on the course, especially on ranges using limited-flight balls. The important thing is to test consistently and compare your clubs with each other.

Method 2 — the on-course gap test

1. Play a quiet round alone, or a few holes when the course is empty.
2. On flat holes with little wind, laser the flag or a landmark before you hit.
3. After your shot, laser (or pace off) from your ball back to where you hit from — and note whether it flew past or short of the target to separate carry from roll.
4. Par 3s suit wedges and short irons; wide-open par 4s suit hybrids and woods.
5. Record two or three efforts per club across the round and take the typical one.

Guidelines for reliable numbers

• Carry, not total. Roll varies with fairway firmness; carry is what crosses water and holds greens.
• Typical, not best. Your bag is easier to use when it covers the shots you hit on a normal round.
• Note the conditions. Wind, temperature and elevation all move the ball — retest if your numbers feel off.
• Retest once or twice a season. Swings change, and so do distances.

Put your numbers to work

Enter your measured carry distances in the optimizer and you'll see your distance map, any gaps or overlaps, and your Bag Score. Unsure what a reasonable spread looks like? Our distance guide has typical ranges per club for amateur golfers.