On my 5 tone program, I have set the tone breaks so that 0 through 10 is the first iron tone. The second tone break is at 67. The third tone break is 81. Most jewelry falls in this range. The fourth tone break is at 88. This is where the zinc pennies fall in. The fifth tone break is at 89 for the dimes and quarters and silver.
I have the discrimination set at 10. And I have also adjusted the tones to the way that I like them.

Corvallis, OR
Detectors:
Tesoro Bandido II Umax (2)
Tesoro Outlaw
Whites MXT Pro
Minelab Equinox 800
Minelab Vanquish 540
XP Deus
XP ORX
Whites XLT