I recently started hunting a local site and found it plaqued with old rust bottle caps. Looking at the dimpled surface of the ground, it was obvious the site had been heavily worked previously. My F-5 that I had with me unfortunately read almost every rusty cap as a solid *high coin* audibly and although a bit jumpy the VDI usually agreed. So the next trip back I brought along my trusty Toltec II. After setting the discrimination accordingly high, on the Toltec II, I dug not one rusty bottle cap.
Using the Toltec II I did dig other large iron objects at this site, i.e., a couple of large rusty washers, rusty can tops, etc., but it did eliminate the rusty crown pop bottle caps. On the other side of the coin, so to speak, while using my F-5, I have dug coins/non-ferrous targets at depths while hunting in our NON native soils*, that I know my Toltec II would more than likely not have located.
Non-native soils, meaning: A layer of loamy topsoil, over our native glacial gravel/soil, W/O the presents, or at least low levels, of Magnetite and or Hematite.
Oh Yes! #1 metal rimmed button, #2 silver 1950D rosie, #3 194? Wheat , #4 lead round ball, possibly modern slingshot ammo.
Using the Toltec II I did dig other large iron objects at this site, i.e., a couple of large rusty washers, rusty can tops, etc., but it did eliminate the rusty crown pop bottle caps. On the other side of the coin, so to speak, while using my F-5, I have dug coins/non-ferrous targets at depths while hunting in our NON native soils*, that I know my Toltec II would more than likely not have located.
Non-native soils, meaning: A layer of loamy topsoil, over our native glacial gravel/soil, W/O the presents, or at least low levels, of Magnetite and or Hematite.
Oh Yes! #1 metal rimmed button, #2 silver 1950D rosie, #3 194? Wheat , #4 lead round ball, possibly modern slingshot ammo.
HH