I've read that when nugget hunting it's best to use all metal mode. I wanted to give it a try using a Fisher F4, which has a true All Metal Autotune search mode requiring just a hint of coil movement. It also has adjustable GB in this mode.
In the Lost Treasures F4 Field Test they indicated that the "F4 equipped with the 4
In the Lost Treasures F4 Field Test they indicated that the "F4 equipped with the 4