Rick, your assumption about notching was in part correct. However, I felt it necessary to mention it, not assuming the experience level of the detectorist and their machines. I did not want to confuse anyone. Obviously, your opinion and mine vary on this issue. I am sure they both have their strong/weak points. I for one, would not rule out something I have not proven to fail, if that 'something' would produce for me one more older silver coin than I presently have. I am only familiar with two meters for the Sovereign, which are Minelab's and the Patriot. I cannot and would not speak of Sunray's meter, as I have no experience with it, so I cannot convince or try to convince you one way or the other. I only know what works for me. That being said, for me, the Patriot out-performed Minelab's meter hands down. If I am partial to anything here, it is Minelab products, as I have both a Sovereign and the new Quattro. The park that I am searching is relatively new and dates back to the late 1920s. The chance of finding Indian Heads, Three-cent pieces or other old 1800s type coins is almost non existent. Thus, I stick by my initial advice about 'running' at maximum discrimination for finding silver coins in the heavy trash. This method works!
V/r
Rick(PA)