I've dug a few rusty nails/spikes, etc. I'm thinking that a rusty target is giving off multiple signals depending on where it is hit. Up at the head of the spike/nail it may be 35-47
Down by the point or a flake off the object it may read 12-47.
If you have everything masked off for silver the E-Track is going to ping on the 12-47 and null on the 35-47.
If you hit the 12-47 in two or more directions you think you have a coin and who wouldn't? But when you dig it you get the entire rusty target.
I don't know this for a fact, I am just imagining what must be happening to me when I dig around rusty iron targets and here "good tone" null, null "good tone" null "good tone" etc.
Now I have pulled clad coins out of the middle of iron, but the signals were SOLID as if they stood alone.
Down by the point or a flake off the object it may read 12-47.
If you have everything masked off for silver the E-Track is going to ping on the 12-47 and null on the 35-47.
If you hit the 12-47 in two or more directions you think you have a coin and who wouldn't? But when you dig it you get the entire rusty target.
I don't know this for a fact, I am just imagining what must be happening to me when I dig around rusty iron targets and here "good tone" null, null "good tone" null "good tone" etc.
Now I have pulled clad coins out of the middle of iron, but the signals were SOLID as if they stood alone.