I try and dig all signals. I do mostly woods detecting and those brass shotgun shell ends read in the pull tab and nickel range, so shotgun shell ends drive me crazy like digging pulltabs does. I do not want to miss the nickels, I have plenty of buffalo, war nickels and a few V nickels I would have missed. Most rings I have detected were in the nickel and pull tab range on the DFX, but the real small rings were reading like a dime, penny.