There is a lot more left in the ground than you may think. I decided to hunt for less than an hour before sunset this evening at a small park that we have been working for weeks now. All of the parks around me have been hit hard by the local detector club that meets once a month and has many members. So far this park has netted me a 14k gold ring and a fist full of wheat pennies. Tonight I tried literally moving the coil as slow as possible and methodically working a small area. With the settings I'm using the detector will sound off nicely on iron from certain angles but I'm learning to tell the difference from coins, etc. The goodies will usually reveal themselves with patients and a lot of wiggling the coil, etc to sniff them out. I dug a couple more wheats at 8 to 10 inches and was approaching the car to pack up for the night when I got another iffy signal mixed with iron. It was nulling in one direction but was mostly good in the other. I got a couple hits 00 29 and 10 inches depth. Digging this target produced a rather large men's sterling ring. I was hesitating going out for this short hunt but glad I did.