The Callaway 300 Pro is the rangefinder that already has the magnet. It ranges from 5 to 1,000 yards, locks onto a flag out to 300 yards, reads to ±1 yard through 6x optics on a two-colour OLED display, and carries a Magnahold magnetic mount in the body so it sticks to a cart rail without an accessory strap. Slope is on an external switch, so it is tournament-legal with the switch off. It takes a CR2 cell behind a door, and sits in the $250–300 band.
Callaway 300 Pro at a glance
- Range: 5–1,000 yards; pin lock to 300 yards
- Accuracy: ±1 yard
- Optics: 6x, two-colour OLED display
- Slope: external on/off switch — legal in competition with it off
- Battery: CR2 3V lithium behind a battery door
- Built-in Magnahold magnet; weight around 5.4–7.6 oz
- Typical price $250–300
The short version
Strong points: Built-in magnet, external slope switch, ±1 yard, and a price well under the Bushnell Pro line.
Known irritations: Owners report the display can be hard to read in low light, and the auto-shutoff is aggressive on a slow round.
Not tested in hand: Specifications come from Callaway documentation and retailer listings; behaviour comes from aggregated owner reports. We do not test rangefinders ourselves.
Specifications
| Item | Callaway 300 Pro | Confirmed by |
|---|---|---|
| Total range | 5–1,000 yards | Callaway and retailer listings |
| Pin-seeking range | Up to 300 yards | Callaway and retailer listings |
| Accuracy | ±1 yard | Callaway and retailer listings |
| Magnification | 6x | Callaway and retailer listings |
| Display | Two-colour OLED | Callaway product material |
| Slope | External on/off switch | Callaway product material |
| Pin confirmation | P.A.T. pulse feedback | Callaway product material |
| Mounting | Magnahold magnet built into the body | Callaway product material |
| Battery | CR2 3V lithium, battery door | Callaway support material |
| Weight | Around 5.4–7.6 oz depending on listing | Retailer listings |
| Water rating | Not confirmed here | — |
How to use a Callaway 300 Pro
- Open the battery door and fit a CR2, noting which way the flat end faces.
- Turn the eyepiece until the OLED display and the reticle are sharp. This is focus for your eye, not zoom.
- Press the power button once to wake it.
- Check the unit setting in the display before you trust a number — yards or meters.
- Set the slope switch: off for competition, on for practice.
- Hold the crosshairs on the flag and hold the button through the scan. P.A.T. pulses when it has the pin rather than the trees.
Aiming technique, and why you should also shoot the front and back of the green, is covered on how to use a golf rangefinder.
Does the Callaway 300 Pro have slope, and is it legal?
Yes, and yes — with the switch off. Slope on the 300 Pro is a physical switch on the body rather than a setting buried in software. That distinction is what makes it usable in competition: the Model Local Rule permitting distance-measuring devices requires that the device is not capable of measuring elevation change during the round, and a switch that a playing partner can see satisfies that far more cleanly than a menu nobody can check.
The battery, and the mistake worth avoiding
One CR2 3V lithium cell, behind a door rather than a screw cap. The door is the part that gets lost or cross-threaded, so open it over a table rather than over long grass. A CR2 in weekend use normally lasts a season, because the unit is asleep almost all the time.
Battery type across every model we have documented is in the finder table on which battery does my rangefinder take.
Callaway 300 Pro problems and fixes
Four faults come up repeatedly in owner questions. Three of them are user-fixable.
| Symptom | First thing to try | If that fails |
|---|---|---|
| Not vibrating on lock | Confirm you are holding the button through the whole scan; P.A.T. pulses only on a confirmed pin | Fit a fresh CR2 — weak cells kill the pulse first |
| Not showing a distance | Brace the unit and scan across the flag; check the objective lens is clean | Battery pull, then a fresh cell |
| Display hard to read | Switch display colour if your unit offers it; adjust the dioptre | Low-light readability is a known owner complaint on this model |
| Shuts off mid-hole | Expected behaviour — the auto-shutoff is short | Nothing to fix; wake it with the power button |
| Reading in meters | Cycle the unit setting | Per-model button sequences: meters to yards |
A symptom-first table covering every brand is on rangefinder not working. Warranty routes are on rangefinder repair and warranty.
Cases and mounting: what this model actually needs
Because the Magnahold magnet is built in, the 300 Pro does not need the magnetic strap that most lasers do. What it does need is a case that closes around a body with a magnet in it, and that does not fight the mount.
- Callaway 300 Pro cases — what ships in the box, replacements and skins
- Rangefinder magnets — read this to check whether you need one at all
- Cart holders and cradles — for push carts, where a magnet has nothing to grip
- All golf rangefinder cases compared
How it compares, and what to pay
The 300 Pro competes with mid-range Bushnell Tour models and with Callaway’s own CSI Pro. Against the Tour line it wins on the built-in magnet and on price; the Bushnell reputation for fast acquisition is the counterweight. Against budget Amazon brands it wins on documentation and support, which is worth more than it sounds when something goes wrong two seasons in.
Specification-level comparison of every model we have documented is on the model index. If price is the deciding factor, the discount cycle is on golf rangefinder deals and the second-hand checklist is on buying a used golf rangefinder.
Is the Callaway 300 Pro a good rangefinder?
On specification it is competitive for the money: ±1 yard, 6x optics, pin lock to 300 yards, an external slope switch and a magnet built into the body, at $250–300. The two recurring owner complaints are low-light display readability and a short auto-shutoff.
Does the Callaway 300 Pro have slope?
Yes, controlled by an external switch on the body. With the switch off the unit reports true distance and is legal under the Model Local Rule for distance-measuring devices.
What battery does the Callaway 300 Pro take?
One CR2 3-volt lithium cell, behind a battery door. It is the same cell most golf lasers use.
My Callaway 300 Pro is not vibrating. How do I fix it?
The P.A.T. pulse only fires on a confirmed pin lock, so first make sure you are holding the button through the whole scan rather than tapping it. If it still does not pulse, fit a fresh CR2 — a weak cell affects the vibration motor before it affects the display.
How do I do a factory reset on a Callaway 300 Pro?
There is no reset button. Remove the CR2 for about ten seconds and refit it; that clears most stuck states on this class of laser. If the fault survives a fresh battery, it is a warranty matter.
When did the Callaway 300 Pro come out?
We have not been able to confirm a launch date from Callaway’s own material, so we do not state one. It has been in the range long enough to be widely available second-hand and to be discounted regularly.
Callaway 300 Pro or a Bushnell?
Different trade-offs. The 300 Pro gives you a built-in magnet and a lower price. The Bushnell Tour line gives you a deeper support network and, by reputation, faster acquisition. Both use a switch for slope, so both are straightforward in competition.
How this page was made. Written by The Golf Rangefinder editorial team from manufacturer specifications, published manuals and aggregated owner reviews. We do not test rangefinders in hand and we never claim to. Last checked: September 2026. Prices change; the retailer page is the final word.
Sources
- Callaway TAG — product support
- Callaway TAG — 300 Pro laser rangefinder
- Callaway TAG — manuals
- Callaway 300 Pro manual (ManualsLib)
- Aggregated owner reports from the MyGolfSpy forum and retailer review sections