I received a 6x10 DD coil from Whites and am not sure if it is woking properly. I expected lesser depth, but it seems to have a lot of problems locking onto targets. I tried it on my miniature test garden and it had alot of difficulty locking onto a 4" quarter whereas as my stock coil and 12" spider coil make short work of the quarter and my other items. I've tried it in the field as well and it just seems not to ID well on even very shallow targets ( one penny at 1" depth being the exception). I'm wondering if I have a bad coil or if I just need more time to figure out the nuances of a DD coil. Any help would be appreciated as I am still in the newbie category and only have about 2 hours with this coil. Thanks for reading.