“You should have 10 yards between each iron.”

That’s one of the most common guidelines in golf. And, as a starting point, it makes sense. “Ten yards” is easy to remember and easy to build a bag around.

But when you look at real on-course data from Shot Scope, iron yardage gaps don’t neatly fall into 10-yard increments.

To see what’s really happening, we pulled Shot Scope Performance Average (P-Avg) data and calculated the average gap between irons by handicap. This isn’t launch monitor “perfect strike” carry; it is real on-course performance so keep that in mind.

Iron yardage gaps by handicap (Shot Scope P-Avg)

All numbers below represent the average yardage gap in yards between clubs.

Why 10 yards isn’t a universal truth

Even scratch players don’t live in a perfectly spaced 10-yard world.

Look at the 0 handicap column:

• 6i–7i is just 7 yards
• 4i–5i jumps to 23

At lower handicaps, long iron gaps tend to be larger because players generate more speed and deliver loft more consistently. Small changes in loft and ball speed translate into bigger yardage jumps. In the middle of the bag, you’ll see more consistency but not always that perfect 10-yard gap.

But as handicap rises, distance separation starts to compress in the middle of the bag. Notice how the 6-iron to 7-iron gap shrinks to just five yards at the 20- and 25-handicap level. That’s a strike consistency issue.

When contact moves around the face, ball speed fluctuates and yardage gaps disappear. Many higher handicaps don’t just hit shorter shots; they hit several different clubs all about the same distance.

A quick note on the “outliers”

You’ll notice some gaps don’t follow a clean progression. For example, the 15-handicap 5i–6i gap is smaller than the 20-handicap gap in the same spot.

Remember that this is on-course performance data. It reflects real strikes, real equipment choices (game-improvement, super game-improvement irons, etc.) and real confidence levels with certain clubs. Golf performance isn’t perfectly linear and neither are the averages.

Most importantly, neither are yours. And that’s exactly why you need to measure them, track them and have a better understanding.

The takeaway

Ten yards is a helpful benchmark. But your actual yardage gaps are a product of your delivery, your strike pattern and your consistency.

The goal isn’t to force your irons into neat 10-yard buckets. The goal is to know your real carry numbers and identify where gaps compress or jump. Not only will this help you get the correct equipment in your bag but it will make a big difference in your course management skills. Better scores will result.