Update
I went back this morning for 1.5 hours. I found 1 1992 penny. I disc metal 1-17. All I kept getting lots of 64-74. Everything I dug was beer and pop cans and old pull tabs.
I dug many foil signals to find foil. After, about 35 holes, I mean plugs, I gave up.
Best finds were the penny, a door hing, 12 plow points, 9 nails that were in the same holes of other things I was digging, a few unidentified scraps of iron, 1 small buckle probably from horse bridle.
I was disappointed. There is so much garbage like cans, pop tops etc, I think I'm going to not go back. It a shame because it looks awesome with 3-4 old sacks, huge oak trees and and 2 barns that aren100 years old. There has to be some old stuff but the whole grounds are groomed and planted. I can't mess that up!
