I went to a local park today, and used the Ag coins only program in the Sabisch book and the 11" coil. Found a silver ring and some change. Shallow pennies sounded off as well. It would be better to use this program along with my 8" coil to reduce the nulling out effect. Reason to use the Ag only program: the ground is so dry and hard that I want to keep digging to a minimum, for my sake and the park's.