I've been hunting with my Fisher F5 for a couple months now and found I don't know how much clad with it. Last week, I dug this beauty. A 1850 half dime. I have also been digging some Civil War relics with it. So far I'm loving this machine. When I dug the half dime I had the Gain set on 85 and the threshold set on -3. I dug it about 3 to 4 inches down. I'm hitting this site hard and will post if I find anything else. I'm still learning the F5 and so far I'm 100% pleased with it!!