............your best bet is to go zero DISC and scoop all. Gold rings and other good targets can be found throughout the entire spectrum of conductivity which in the case of CZs incudes IRON which tends to downshift on deep targets that are out of the correct ID range.
Practice in a clean spot on the lawn with a variety of targets to learn accurate pinpointing, correct sweep speed for depth and target seperation with reliance on the tonal patterns. In time you will be able to accurately call the shots on common items such as hairpins, dimes, nickels vs pulltabs and rings vs pulltabs.
My approach has been to start the day in zero DISC and notch out the Zinc cents when they become pesky. The obvious trade-off is that I have found some gold rings as ZINC before it is notched out. Rare, but it does happen. I have a plausible basis for estimating that I dug 10,000 ZINCs before finding my first gold ring reading as ZINC.
A good start on the beach is to work the towel line in NORM mode for lots of clad, some jewelry and other good targets passed over by detectorists using less capable machines. Learn your beach and where bathers tend to congregate and play and prioritize those areas. When you hit a "hotspot" that's yielding, use a grid pattern to milk it. I've even followed that with diagonal sweeping to yield yet more.
If you're unfamiliar with the beach, use a zig-zag search pattern to locate the line of drops in the dry. That pattern is very useful in the tidal zone where the targets line varies every day.
There's a lot to learn about detecting and your detector. This is a challenging hobby with never-ending surprises that turns detectorists into addicts.
Hope that helps and lots of luck.
Chet
