Went back to the same spot where my son and I went last weekend. Some of the bullets were 4-6" down, but 1 was a measured 9" and the bayonet scabbard tip was a measured 12" down and even at that was a solid signal. I have no doubt it would have been a diggable signal at 13-14". So far it is the deepest relic I have found with the G2 with 13" Ultimate coil.