I got a signal that sounded like a deep little bucky ball, kind of like an inverted almost cold rock deep tick. This signal was very narrow ( maybe 40 degrees out of 360 degrees ) and I would lose it if I only slightly turned. There was an iron grunt from all other angles. My detecting buddy checked it with the F75 in all metal and disc. 0 + 4 tone and could not coax anything that would indicate there being something other than ferrous in the hole. Well not being ready to call it a day I decided I would investigate. I cut a deep plug and had a square nail at about 4". I almost covered up the hole but decided to rescan it and I could still hear the deep inverted sounding tick. So I took out more dirt I was down to about 12" deep by now and still getting the tick in the hole. I double checked with my pro-pointer and it slightly signaled on something directly in the center of the hole. I thought what the heck would be this deep so almost ready to give up I decided I would sink the shovel one more into the bottom the hole. Down about 18" I felt the shovel hit something. I reached in up to my elbow and out came a handful of Civil War Bullets followed by another handful. Ended up being 210 civil war bullets ranging from 18"-24" deep. Don't buy it when people say the Gold Bug is not deep.