Bushnell A1-Slope vs Nikon COOLSHOT 20i GIII

The Quick Verdict

Get the Bushnell A1-Slope. It's the better-built device at a legitimate price point, with USB-C recharging, a tighter accuracy spec at distance, and a more weather-resistant body. The Nikon COOLSHOT 20i GIII makes sense if you're hard-capped around $220 and don't mind running on CR2 batteries — it's a competent rangefinder that won't embarrass you on the course, but you're giving up a meaningful amount for that $80 savings.

What They Have in Common

Both are compact, pocket-sized rangefinders with 6x magnification and legal slope switches for tournament play. They'll both get you to ±1 yard on approach shots, and both have first-target priority so the flag reads before the trees behind it. If you handed either one to a playing partner, they'd have no complaints using it.

Where They Differ

Accuracy at Distance

This one matters more than it looks on paper. The Bushnell A1-Slope holds ±1 yard accuracy out to 350 yards. The Nikon COOLSHOT 20i GIII is rated ±1 yard to 100 meters (about 109 yards), then bumps to ±2 yards beyond that. For most approach shots — say, 150 yards into a par 4 — that difference is academic. But on longer par 3s or when you're trying to dial in a layup number, the Bushnell's tighter spec is doing real work. If you're already a 6-handicap who cares about exact carry numbers, that gap is the ballgame.

Battery and Charging

The A1-Slope runs USB-C rechargeable and Bushnell rates it at 50+ rounds per charge — call it around 3,000 shots. The COOLSHOT 20i GIII runs on a CR2 lithium battery. CR2s are fine and available at basically any pharmacy in the country, which matters more than people think mid-trip. But there's something genuinely convenient about dropping the A1-Slope on the same charging brick as your phone the night before a round instead of hunting for a CR2 at 7pm before an early tee time. The rechargeable format wins for everyday use; the CR2 wins if you're the type who forgets to charge things.

Weather Resistance and Build

The Bushnell carries an IPX6 rating — that means it can take a direct stream of water without failing. The Nikon is listed as "rainproof," which is a softer designation. Both will survive a wet October round, but IPX6 gives you more actual protection if you're regularly playing in heavy rain or dropping it in the cart during a storm. If you live somewhere that sees real weather, that's not a trivial difference.

Range and Feel

The A1-Slope tops out at 1,300 yards; the COOLSHOT 20i GIII caps at 800. You're almost never ranging 800+ yards on a golf course, so the practical difference is minimal. The Nikon does have Nikon's multilayer lens coating, which is a genuine optics pedigree — the COOLSHOT line has been solid for years. The A1-Slope is Bushnell's smallest rangefinder yet at 3.75 inches long and 5.1 oz. The Nikon checks in at 4.6 oz, so it's lighter, but both will fit in a shorts pocket without drama.

Who Should Buy Which

Get the Bushnell A1-Slope if:

• You play regularly (multiple times a week) and want to plug in once a week rather than keep a CR2 stash in the bag
• You're a mid-handicapper trying to get serious about distance control and want the tighter accuracy spec to mean something on longer approach shots
• You play in variable weather and want a device that can get genuinely wet without a prayer involved
• You're the person who loses their rangefinder in a cart and wants the magnetic skin to actually hold it somewhere

Get the Nikon COOLSHOT 20i GIII if:

• You've got a hard budget around $220 and that $80 is a sleeve of balls you'd rather spend on the range
• You play occasionally — once or twice a month — and a CR2 battery lasts a long time at that cadence, so the rechargeable benefit shrinks considerably
• You already know Nikon optics and trust the brand; the COOLSHOT line has a loyal following for a reason
• You're buying this as a travel rangefinder and want something light enough to forget it's in your bag

The Bottom Line

The Nikon COOLSHOT 20i GIII is a capable device at a fair price. But the Bushnell A1-Slope is genuinely better — more weather-resistant, more accurate at distance, and more convenient to keep charged. The $80 gap is real, but seems like Bushnell earned it here rather than charging extra for the name. If the price difference stings, wait for a sale on the A1-Slope before settling. These two aren't as close as the shared specs suggest.

Get the Bushnell A1-Slope.