KYbourbon,,, it was a combination of both.. I had always run my sensitivity at 10 if my baby could handle it but after reading many posts by good professionals, I set it to 4.8 as recommended and slowed down. Im still debating if running my CZ-3D at 4.8 as recommended or running it at 10 if there is a difference. I do know that at 10 it does give the wrong signal when iron is present.
This place that I found was a field where there were taking off top soil to use somewhere else. I just asked if I could hunt after hours and the guy said fine, so there was about 4 inches taken off from the soil. Whats wierd is the 1844 coin was just laying on the top of the soil slightly covered which would of been about 4inches down,, but then if you have ever held a half dime there is nothing to it. At first I thought it was trash because it was so small but I saw a star on it so I knew I had something. The dimes were down deeper between 5 and 8 inches. So with the top soil off the coins would of been down 11 or 12 inches. In the field where they have not taken off the top soil I have detected but only have found wheat pennys, and there is a lot of iron that is masking the silver. Thats the only bad thing about the CZ-3D is that Iron masks good signals. If only I could take off the first 4 inches of every place I hunt to get rid of the bits of iron and trash that mask good signals.....