Hey guys, I have a Bounty Hunter 505 and I just bought my son the Bounty Hunter 202. We decided to do some comparing and we put both detectors on the kitchen table and set the detectors to the "all metal" mode. We passed silver and clad coins in front of the coils. The 202 seemed to work fine but the 505 would not pick up on the coins unless they were within 2" of the coils and the readout said they were 10" deep. I replaced the batteries and had the same results. I took the detectors outside and put the coins on the ground and got the same reports as on the table. I checked the batteries and they read 9.23v and 9.3v. I swapped the coils from the 202 to the 505 and the problem stayed the same on the 505. Any information on fixing this problem would be great. Thanks