Garrett ACE 300 Review: The Waterproof Coil That Sets a Trap

It turns a guess into a number you can learn to trust. Garrett publishes iron reading at the bottom of the scale, small and low conductors reading low to mid, and copper and silver reading toward the top, which is a physical ordering rather than a marketing claim. Iron resolution builds on that by giving finer separation near the iron end of the scale specifically, which is where a beginner otherwise digs the most trash on an old lot or a well-used park.

Electronic pinpointing through a non-motion all-metal mode is the second quiet win here. Instead of sweeping back and forth to triangulate a target by ear, you hold the coil still over the spot and the mode tells you directly, which shortens recovery time and reduces the size of the hole you dig. The pinpointer guide covers the handheld tool that speeds this up further once you own one.

Published figures only. Garrett states less numerically about the ACE line than Minelab and Nokta state about theirs, which shows as gaps below.

This is the table that matters most, because water capability is where the ACE line and its waterproof rivals genuinely part ways.

This is the single fact that most new ACE 300 owners learn the expensive way. Garrett's ACE line documentation states clearly that the searchcoil is waterproof and can be submerged in shallow water, streams or damp shoreline sand, and states just as clearly that the control box is not waterproof. That is a coherent design for a park and field machine and it is a trap for anyone who assumes a metal detector marketed for beach use means the whole unit can go under. A slip while wading, a wave over the shaft, or leaving the machine face down in wet grass overnight are the three ways this actually happens, and all three are avoidable once you know the rule.

Second, single frequency. Garrett publishes an adjustable frequency to cut interference from power lines and nearby detectors, which is genuinely useful, and that is a different capability from simultaneous multi-frequency. On a salt beach a single-frequency machine reads the conductive ground as a target it cannot cancel, and no amount of adjustment closes that gap. If salt water hunting is on your plan, this is not the machine for it, and the frequency chart explains why in full.

Third, the ceiling relative to Garrett's own range. The Garrett ACE 400 sits a short step above at $357.99 and adds iron audio, letting you hear discriminated iron rather than only see it silenced, which is a real upgrade on old sites. If your budget can flex that far, the arithmetic favours the 400. The ACE 300 against ACE 400 comparison runs the numbers side by side.

Durability and a short learning curve dominate the published owner reviews. This platform has been sold for a long time, coils and parts are easy to source, and new owners consistently report being able to hunt with confidence within a session rather than a season. The 0 to 99 target ID display is described as easy to read outdoors, and iron resolution is credited with cutting the number of nail and bottle cap holes dug on old ground.

The recurring complaints track the specification gaps directly: chatter near power lines until the frequency is shifted, no real waterproofing for anyone who hunts near water, and a sense of hitting a ceiling in trashy or mineralised soil after a season or two. Owners on iron-heavy sites consistently recommend a smaller aftermarket coil, and the ACE coil compatibility chart lists what actually fits. As with every machine here, bury your own test targets and check the numbers your unit reports, since the ACE 300 target ID chart gives ranges rather than a lookup table.

Buy it if:

• You hunt dry parks, yards, school grounds and fields and will not wade.
• You want a genuine numeric target ID at an entry price, with iron resolution built in.
• You value a long-running platform with easy parts and coil availability.
• You want a short menu you can learn in a single afternoon.

Skip it if:

• Any part of your hunting plan includes wading, surf or submersion.
• Salt beaches are on your list. Single frequency struggles there regardless of coil.
• You can stretch to the ACE 400, which adds iron audio for a modest step up.
• You want a fully waterproof machine at this price, where the X-Terra Pro publishes 16 feet.