If you were to ask the best players in the world how they conducted ball testing, nearly all of them would come up with the same answer for where they begin: around the green.
Tiger Woods, for example, starts by hitting delicate chips to see how the ball reacts on the green. This is where pros get a sense of whether a ball is worth its salt. If a ball can't execute certain short game shots, it's almost guaranteed to get cut from the list of possible options.
For most recreational golfers, ball testing is usually done in the reverse order. More time is spent hitting drivers, fairway woods and mid-irons—clubs that, while important, don't produce significant performance deltas in a head-to-head ball test.
In previous testing we've conducted with the Golf Laboratories swing robot, the ball-speed difference with a driver between the top-5 balls was less than 0.3 mph, while the delta between the fastest and slowest came out to roughly 3 mph (about 9-10 yards). While launch and spin numbers vary, the results are fairly similar.
The same can't be said for a half-wedge shot (40 yards), where spin changes drastically, depending on the ball model you're using. Playing a ball that performs well off the tee but struggles to generate enough spin to hold a green requires players to adjust how they play certain short game shots. That's assuming you realize your ball isn't holding the green.
For golfers who don't have access to an endless supply of balls and time, we ran 54 urethane and non-urethane balls through half-wedge testing on the Golf Laboratories swing robot to measure two things a golf ball can actually do differently on a key short game shot.
The interactive graphic below measures how much spin the ball generates on average, as well as how much spin varies from one strike to the next. Both numbers are important for golfers, especially those who wonder whether it's worth splurging for a urethane offering.
Testing protocol
Golf Laboratories delivered the wedge shots in San Diego, using a 56-degree wedge with a S300 steel shaft. The robot was configured for a neutral attack angle, a square path, and a square face. Club speed was fixed at 46 mph, enough to generate a 40-yard carry and no more.
Each ball took six center-face strikes, with an R&D-grade Foresight GCQuad launch monitor capturing the data. Conditions were 68 degrees, dry, and windless. The 54-ball field carries 36 urethane-cover models and 18 non-urethane models, sorted according to the Golf Digest Hot List's own classifications and, for the balls not on the Hot List, by the manufacturer's published cover material.
How to interpret the visual
Similar to the interactive graphic we created for the recent 74-driver test, the goal is to offer you something that's visually appealing and easy to understand.
Each dot on the matrix represents one model we tested. The vertical axis is the mean spin rate across the ball's six shots. The horizontal axis is the spin variance—standard deviation across those same six shots.
Field medians run through both axes in red at 5,127 rpm and 229 rpm, marking the middle of the field. Balls above the horizontal line spin more than the median ball, while balls to the left of the vertical line spin more consistently than the median.
The upper-left quadrant is where balls with consistent high spin live, meaning they have ample spin to hold a green, but the spin rate doesn't change much from one ball to the next. The upper-right is where balls that generate inconsistent high spin rates live, so you'll see spin vary between balls, which can affect how the ball reacts when it hits the green.
The lower-left is what we like to call the "value-tier landing zone," where spin ceilings are lower but shot-to-shot repeatability is often as tight as anything in the upper-left quadrant. The lower-right is a quadrant no ball wants to be in, and thankfully most aren't.
Click any dot to inspect that ball's six-shot cluster and its rank across five other metrics. Use the compare dropdowns to run two balls directly against each other, or sort by brand to see how the stack up.
Why this matters
Three things stand out in the field of 54. The first is that only one ball combined a top-tier ceiling with a top-tier floor: Bridgestone Tour B XS. Every other ball in the top third of the spin range paid for its peak numbers with a variance number two to five times bigger.
As we mentioned above, variance from one ball to the next will affect launch and spin. And when you're talking about a short game shot where accuracy and placement is critically important, you want the variance to be as tight as possible.
One caveat: It's very possible these numbers could shift if you increased the number of ball from six to a dozen or two dozen. But it likely wouldn't be significant enough to alter the interactive graphic in a meaningful way.
The second is that some balls have a repeatability problem on a 40-yard shot. Mizuno's Pro S and Pro X posted the widest shot-to-shot variances of any balls tested at 599 and 504 rpm. Both balls generate respectable mean spin, to be clear. The ceiling isn't the issue; the floor is. Based on what the robot saw, the covers behave differently from strike to strike in a way no other manufacturer's covers did at 46 mph.
The third is that cover material predicts spin capacity almost perfectly. Every non-urethane ball in the field spins less than every urethane ball, with one exception. XXIO Hyper RD produced 3,826 rpm, edging past Snell PR4's (3,770 rpm) by 56 rpm. Otherwise the two categories don't touch. If you take one finding from this test, it's that the cover material printed on the box is the single most reliable predictor of how a ball will behave inside 60 yards. Everything else is calibration.
Bottom line, there is no perfect ball for every player, but there is a perfect ball for every priority. If your short game decides your scorecard, the upper-left quadrant is where your search starts. If price matters more than an incremental spin gain, the lower-left urethane balls (Snell PR3 and PR4, Seed SD17) and the tighter non-urethane models (Srixon Q Star, Maxfli Softfli) will check up on greens more predictably than most golfers assume.