Went south to relic hunt on Thursday and Friday. I went back to the same site as the first field test....targets now are very few and far between. All the targets found were from 8 - 12" down. Deepest non-ferrous target was a blob of melted lead about the size of a quarter at a measured 11" down. Audio was soft but still a "dig me" signal. The very end of a horseshoe (about 1" long) was recovered at 12". So, in this soil (mild) the G2 with the 13" Ultimate coil can get non -ferrous targets down to about 11"....not bad....again this is about a 2" gain in usable depth. Your results may vary. Bill