I have been using Bryce' suggested settings with iron mask=22 turned on. The coins I am now finding are registering at the top of the smart find but more towards the iron range; say for instance 18 29 on the digital scale (ended up as wheat penny). If someone was hunting in the normal coin mode, they would not find these coins. I dug a few wheats, Lincolns, and a couple clad dimes this evening, all of which were falling in the same ID area. The signals have been generally good from all angles and around 8" depth. I also did dig another silver ring last night.