After being side-tracked for a month on a couple of other machines, I got out today to the same spot that I've hunted with the other machines. Althou they seem to get the targets faster in the iron infested sites they still fall short of the raw depth of the Xterra 70 with the 10.5DD coil. Most of the three ringer bullets were found at the 8" or more depth. Some of the small pistol bullets were found at the 6-8" depth level in rocky soil, medium hot ground. It took me about an hour to get my "Ear" back for the Xterra for the deeper targets. No matter what machine I use, I ALWAYS return to the Xterra for the deep target recovery.Oh, by the way, my hunting buddy had the same results with his 705 with the same coil.......MO