In civil war relic hunting in southern Va, I've learned not to get too reliant on conductivity numbers at the top of the CTX screen. In red soil, you can almost throw those numbers out of the window. I found that even if you get a halfway good tone, DIG IT, because even though the numbers might show 35-47, it might be a nice bullet. Yesterday, I dug about a dozen Spencer carbine bullets and Colt dragoon pistol bullets that the numbers indicated should have been an iron reading. It was all in very red soil!