Went out detecting to an old school built in the 1930s.I was only there for 1 1/2 hours. Dug up 32 quarters,none of which were silver.I was using ACE250 with 10 by 14 inch coil,It gets a lot deeper,Dug one quarter at 10 1/2 inches wasnt a state quarter,but wasnt silver either.Only did a space of 20 yards by 20 yards. I got tired of digging at 64 years of age. My legs are sore today I will return on Sunday and do another section.Old school sits on 8 acres So will take quite a while to finish.Amazing this ist section was right next to a corn field.Still I was disapointed there was no silver.There should be. HH Wayne