How Many Swings Before a Number Means Anything?

Nothing in a fitting is more quietly decisive than shot count, and almost nobody asks about it. A fitter who lets you hit five shots with each of four shafts has run a test with no statistical content whatsoever. A fitter who has you hit thirty with each has run a test that measures your endurance.

Why Five Shots Tells You Nothing

Golfers are inconsistent. That is not an insult, it is the entire reason fitting exists. If your driver carry varies by fifteen yards between your best and worst reasonable strikes, a block of five shots can land anywhere within that range by chance alone.

Two shafts that are genuinely identical will regularly produce five-shot averages six or seven yards apart. If you make a decision on that gap, you have chosen the shaft that happened to catch the good run. It looks like data. It is a coin flip with a decimal point.

Why Thirty Shots Also Tells You Nothing

The opposite failure is less obvious and just as common. Clubhead speed drops as a session goes on — sometimes by two or three miles per hour, sometimes more in summer heat. Strike quality degrades with it.

So a long block does not converge on a truer average. It drifts. The last ten shots of a thirty-shot block belong to a slightly different golfer than the first ten, and averaging across the whole thing blends two populations together.

Worse, if you test shaft A first and shaft B twenty minutes later, shaft B is competing against a fresher version of you. That ordering effect is one of the most common invisible errors in fitting.

Where the Window Sits

In practice, ten to fifteen recorded shots per option, from a golfer who is warm and not yet tired, is the useful range for a driver or iron test. Wedges tolerate slightly fewer, because the swing is shorter and less taxing. Putters can go higher, since fatigue barely applies.

That means a session can honestly compare three or four options, not eight. Which is why the narrowing process matters so much: you use the first part of the session to eliminate on obvious grounds, so the shots that remain get spent on a comparison that deserves them.

Trimming, and Why We Do It

From every block we drop the two best and two worst results before averaging. This is not a way of hiding bad shots; it is a way of stopping one outlier from dominating a small sample.

The alternative — averaging everything — means a single flushed strike can lift a block's average by four or five yards, and a single top can drag it down further. In a ten-shot block, one outlier is ten percent of the data. Trimming produces a number that represents what you do repeatedly, which is the only thing worth fitting to.

We also report the spread, not just the average. Two shafts averaging the same carry with different dispersion widths are not equivalent options, and only the spread reveals that.

Alternating, Not Blocking

Where a comparison is close, we stop testing in blocks and start alternating: five with A, five with B, five with A, five with B. This is slower and slightly more annoying for the golfer, and it removes the ordering effect entirely, because fatigue and warm-up now apply equally to both sides.

Outdoors we always alternate, because wind changes over time and a block structure lets a gust favour one candidate.

What to Ask Your Fitter

Wherever you get fitted, three questions are worth asking:

1. How many recorded shots per option are we using?
2. Are you trimming outliers, and how?
3. Are we testing in blocks or alternating?

A fitter who has good answers to those has thought about measurement. A fitter who has not considered them may still choose you a fine club, but it will be by judgement rather than by evidence — and you should know which one you are paying for.

The Honest Limit

Even done properly, a fitting is a sample from one afternoon. It is a far better sample than guessing, and it is not a guarantee. That is why we offer a free follow-up adjustment within ninety days of a build: four real rounds tell us things no ninety-minute session can.