Range balls vs premium balls: what changes in your numbers
More than you'd think. Range balls don't just fly a bit shorter. They change distance by different amounts for different clubs, they make your spread two to four times wider, and with a wedge they can even go further with half the spin. If you hit range balls on Tuesday and your own ball on Saturday, most of the difference is the ball.
What a robot found
The best test of this used a swing robot, which is useful because a robot has no bad days. It swung the same way every time, once with worn range balls and once with premium balls. Here's what changed with the range balls:
| Club | Distance | Spread and spin |
|---|---|---|
| Driver | 12 yards shorter | About twice as wide side to side, and the shot-to-shot scatter 3–4 times larger |
| 5-iron | 8 yards shorter | About 4 times the range |
| Pitching wedge | 4 yards longer | Spin roughly halved |
Read that again. A robot that swings identically every time got two to four times the spread just from changing the ball. Any spread you measure with range balls is telling you about the ball as much as about you.
Why that matters for your numbers
Spread. The point of tracking your spread is to find the misses that cost shots: out of bounds, in the trees. Range balls add about as much spread as the whole difference between an 80 shooter and a 100 shooter. You can't see yourself improving through that.
Gapping. You'd think range balls just knock the same few yards off every club, so the gaps stay the same. They don't: the driver lost 12 yards, the 5-iron 8, and the wedge gained 4. So your gaps on range balls aren't your gaps on the course.
Spin. Half the spin on a wedge is a different shot, not a slightly worse one. And spin is already the shakiest number on a launch monitor, so range-ball spin is even less use.
Mats change things too
Most range balls get hit off mats, and mats change things too:
| What changes on a mat | By how much |
|---|---|
| 8-iron spin | About 1,000 to 1,300 rpm less than off grass |
| Launch angle | About 1 to 2° higher |
| Where it hits the face | Higher up, around the 8th–9th groove instead of the 4th–5th |
| Carry | Reads around 10 yards longer than it really is |
Treat those numbers as rough, they come from industry testing. The most important one has no number at all: a mat hides fat shots. The club bounces off the mat into the ball instead of digging in behind it. A shot that would have been a big chunk on grass can look almost normal off a mat.
So what should you do?
Range balls are still useful. Just don't treat them like your real ball.
- Note the ball every session. ShotLab asks for the ball and the surface on every import for this reason. It decides whether two sessions can be compared at all.
- Compare like with like. Range balls against range balls, your ball against your ball, mat against mat. A range session against a premium one just tells you about the balls.
- Build your yardages on your own ball. If you're going to club off a number on the course, get it from the ball you play.
- Use range sessions for things the ball doesn't change much. Club speed is the same whatever you hit. Strike work is fine too, as long as you compare it with other range sessions.
- Take range-ball spread with a pinch of salt. It's worth watching against other range sessions, but for a spread you'd trust on the course, hit a session with a premium or RPT ball.
Sources
- Golf.com, Range ball vs premium ball robot test — industry testing on a swing robot, reported rather than peer-reviewed.
- Broadie and Ko (2009), A simulation model to analyze the impact of distance and direction on golf scores, Winter Simulation Conference — the 80-golfer and 100-golfer spread.
- Mat numbers: industry testing, and the sizes are uncertain. There's no single study to link.