Dean Snell explains why compression readings can differ from one gauge to another, why small differences do not always mean performance changes, and what golfers should actually focus on.
Golf ball compression has become a popular topic again, especially on social media. You may see one person report a compression number, another tester report something different, and a manufacturer list a range that does not exactly match either one.
So what is going on?
In this week’s Tech Talk, Dean Snell answers a question from Rick in Florida:
“I’ve seen a lot of posts on social media about golf ball compression. Not all of them seem to have the same numbers. Why do they vary?”
Dean’s answer gets into how compression is measured, why different gauges can produce different readings, and why golfers should not overreact to a few points of difference.
Compression Is a Design Tool
Dean explains that compression is mostly a designer’s tool. Golf ball engineers use it as a reference point when building performance into the ball, layer by layer.
Compression can help guide decisions around the core, mantle layers, cover, spin, feel, and overall performance. But it is not a magic number that tells you exactly how a golf ball will perform for every player.
Dean’s main point: Compression numbers are useful for design and quality control, but a small difference in compression does not automatically mean a meaningful difference in performance.
Why Different Gauges Produce Different Numbers
One of the biggest reasons compression numbers vary is that not every tester uses the same machine or measurement process.
Dean explains that the traditional industry method used an Atti gauge. With that machine, the golf ball sits on a flat plate, a lever presses down, and the ball is deflected a small amount, typically around 0.1 inches. A spring and needle then produce a compression reading.
But today, other machines may use different deflection amounts, different rates, or different measurement methods. One machine might compress the ball 0.1 inches, while another might compress it 0.25 inches or use a different process entirely.
When the deflection or test method changes, the number can change too.
Compression Readings Are Not Always Apples to Apples
If one person measures a ball at 85 compression and another measures it at 90, that does not necessarily mean the golf ball changed.
It may simply mean the readings came from different machines, different operators, or different measurement methods.
That is why Dean cautions golfers not to compare every compression number as if it came from the same exact process. The numbers can be useful within their own system, but they are not always apples to apples across every tester.
Compression Ranges Are Normal
Golf ball manufacturing also includes normal tolerances. Dean explains that specifications can have plus-or-minus ranges, and it is possible to see several points of compression difference within a dozen golf balls.
That does not mean the balls are defective. It also does not mean one ball will suddenly perform dramatically different from another.
These ranges are used for guidance and quality control. They help manufacturers make sure the product stays within spec, but a small compression difference is not the same as a major performance change.
Why a Few Compression Points Usually Do Not Matter
Dean gives an important example from robot testing. Even when the same golf ball is hit repeatedly by a robot, spin rates are never exactly the same every time.
With wedges, even a robot can produce standard deviations of a few hundred RPMs. Across multiple standard deviations, the same golf ball can show a significant spin range during testing.
That variation is much larger than the performance difference you would expect from a small compression reading change, such as 85 versus 87.
In simple terms: Your swing, strike location, grass, moisture, face contact, lie, and launch conditions can all affect performance far more than a couple points of compression.
Real Golf Has Even More Variables
Robot testing is controlled. Real golf is not.
Players create much wider ranges in launch, spin, speed, and strike quality than a robot does. One wedge shot may spin more, another may slide up the face, and another may come out differently because of grass, moisture, or contact quality.
That is why Dean says golfers should be careful about blaming performance differences on tiny compression changes. In actual play, there are far bigger variables involved.
How Should Golfers Use Compression?
Compression can still be useful, especially as a general reference for feel and design. But it should not be the only factor you use to choose a golf ball.
Instead, golfers should focus on how the ball actually performs in the areas that matter most:
Driver performance
Iron flight
Wedge spin
Greenside control
Feel off the putter
Consistency on the course
That is why Snell offers multiple models built for different player preferences, including the Get Sum, Prime 2.0, PR3, and PR4.
Find the Snell Ball That Fits Your Game
Get Sum
A 2-piece ball with a Surlyn® ionomer blend cover, designed for value, durability, higher launch, and lower spin.
Golf ball compression numbers can vary because different testers may use different gauges, methods, deflection amounts, and measurement systems.
That does not mean the ball is performing differently. It means the number needs context.
Compression is valuable as a design and quality-control tool, but golfers should not obsess over small differences. A few points on a compression reading usually matter far less than how the ball actually performs for your swing, your short game, and your scoring.
Watch the full Tech Talk episode below to hear Dean explain why compression numbers vary and what golfers should know before reading too much into them.
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