How to Use the Callaway 300 Pro Rangefinder

On this page (7 sections)

1. How do you take a distance reading with the Callaway 300 Pro?
2. How do you lock onto a flag?
3. How does slope work, and when should you turn it off?
4. What should you check before your first round?
5. How do you carry and store the rangefinder?
6. How does the Callaway 300 Pro compare with other rangefinders?
7. How to use the Callaway 300 Pro: what to remember

To use the Callaway 300 Pro, aim through the viewfinder at your target and press the measurement button to read distance. Turn on slope for a slope adjusted distance, or switch it off when you need a measurement without slope; a short pulse confirms a pin lock.

The Callaway 300 Pro measures in yards or meters and includes an external slope switch. Its Pin Acquisition Technology helps lock onto a flag up to 300 yards away, while the pulse signals that a distance has been confirmed.

How do you take a distance reading with the Callaway 300 Pro?

Aim at a clear target and press the measurement button. Hold the unit steady while you point at the flag, bunker edge, or other course feature you want to measure.

Read the distance through the viewfinder. The unit measures from 5 to 1,000 yards, with stated accuracy of plus or minus 1 yard, and lets you choose yards or meters.

Start with a fixed target if you're learning the controls. Once you can hold the view steady, aim at the flag and wait for the confirmation pulse.

How do you lock onto a flag?

Aim at the flag and keep the rangefinder steady until it gives a short vibration. The Callaway 300 Pro's Pin Acquisition Technology is designed to lock onto a pin up to 300 yards away.

Trees, signs, or other objects behind the flag can make it harder to isolate the pin. Move the sight onto the flag itself and take another reading if the distance seems off.

The pulse confirms a distance reading; it doesn't tell you whether the flag is the right target for your shot. Check the viewfinder aim and the surrounding course features before choosing a club.

For a plain explanation of flag lock and vibration features, see what pin lock does on a golf rangefinder. If you want more background on distance readings and device types, read what a golf rangefinder is and what it does.

What if the rangefinder reads a tree instead of the pin?

Reset your aim on the flag and try again. Keep the sight on the flag rather than the trees behind it, and hold still while taking the measurement.

If you still can't get a clear reading, move to a spot with a clearer view when course conditions allow. Don't rely on a number that doesn't match the target you intended to measure.

How does slope work, and when should you turn it off?

Slope accounts for elevation change and shows a slope adjusted distance. The unit measures the angle of incline or decline, then calculates an adjusted distance to help you account for the change.

Use the external switch to turn slope on or off. With slope off, the unit gives a distance without the slope adjustment.

The switch is described as legal for tournament play when slope is off. Tournament and course rules can differ, so check the rules that apply to your event before you play.

How to use the slope switch

Set the switch according to the rules and the kind of distance you need. If the event requires a non-slope reading, switch slope off before taking measurements.

When elevation changes matter for your decision, slope can show an adjusted distance. Use that number as course information, then make your own club choice based on the conditions and your play.

What should you check before your first round?

Confirm the battery, unit setting, and slope switch before you reach the first tee. The US version includes a battery, and the rangefinder measures in yards or meters.

Read the quick start guide to learn the controls and check which battery your particular unit uses. The included components are a case, lens cloth, quick start guide, and rangefinder.

The Callaway 300 Pro uses a lithium battery. The Energizer CR2 is a 3 volt lithium option; verify that CR2 is the correct size for your unit before replacing its battery.

Choose the Energizer CR2 lithium two pack if your unit takes a CR2 and you want a spare. Its stated storage life is up to 10 years at room temperature.

Should you use yards or meters?

Choose the unit that matches the measurements you use on the course. The Callaway 300 Pro supports both yards and meters.

Keep the setting consistent during a round so you don't compare distances in different units. Check the quick start guide if you need help changing the display.

How do you carry and store the rangefinder?

Use a case to protect the rangefinder between shots and during transport. The Callaway 300 Pro comes with a molded hard carry case, a carabiner, and an elastic quick-close band.

The unit also has an integrated magnet for attaching it to a cart frame. Place it where it's easy to reach but secure enough that it won't fall when the cart moves.

The ACHIX hard shell case measures about 5.59 x 3.7 x 2.1 inches and is described as fitting most brands of rangefinders. Check the size against your unit before choosing it, since the Callaway 300 Pro already includes its own case.

Pick the ACHIX hard shell case if you want a separate carry option with a carabiner or belt clip. It does not include a rangefinder.

How does the Callaway 300 Pro compare with other rangefinders?

The Callaway 300 Pro combines slope adjustment, pin lock with pulse confirmation, and a cart magnet. Those features suit golfers who want a laser unit with both slope and a way to attach it to a cart.

If you are comparing specific models, read our Bushnell Tour V7 Shift review, Blue Tees Series 3 Max+ review, and Acer Gadget Golf Rangefinder review. For a wider set of options, see the easiest golf rangefinders to use.

How to use the Callaway 300 Pro: what to remember

For how to use the Callaway 300 Pro, aim steadily at the target, confirm the reading, and set slope according to your needs and the rules. Use the pulse as a pin lock signal, and check the battery type before buying a spare.

Choose the Callaway 300 Pro if its slope switch, pin acquisition, and cart magnet match how you play. For model comparisons, start with the Callaway 300 Pro rangefinder guide.

Frequently asked questions

How do you use the Callaway 300 Pro?

Aim the Callaway 300 Pro at a target through the viewfinder and press its measurement button to get a distance. For a flag, keep the unit steady and use Pin Acquisition Technology; a short vibration confirms the distance.

Turn slope on or off with the external switch.

How do you turn slope off on a Callaway 300 Pro?

Use the external Slope On/Off Switch to disable slope. The unit then measures distance without its slope adjusted calculation.

The switch is designed to let you turn slope off for tournament play, but check the rules for your event before using any rangefinder.

What does the vibration on a Callaway 300 Pro mean?

A short vibration, or pulse, confirms the distance after the rangefinder locks onto a target. When aiming at a flag, Pin Acquisition Technology helps lock onto the pin up to 300 yards away.

Keep the device steady and make sure the sight is on the flag.

What battery does the Callaway 300 Pro use?

The Callaway 300 Pro uses a lithium battery, and US units include one. The Energizer CR2 is a 3 volt lithium battery, but confirm the battery type in your unit's quick start guide before buying a replacement.

Store spare batteries as their packaging directs.