I took advantage of a rare, warm day in January. Mid 50's and sunny today. I used the Ace250 today. I notched everything out except Nickel, Dime, Quarters and 50 cents. I seemed to do better on Nickels that way. I didn't dig any pull tabs, only 2 pieces of shredded aluminum no bigger than a nickel. Stock coil, sensitivity at 6. All coins were found from 0-6 inches. Happy Hunting!