Does the 4th tone have any advantages for coinshooting here or is it mainly used for older coins like in great britain. The reason i ask is most of my readings in the 70's range are screwcaps. I read elsewhere where a gold coin was found with a reading of 70 on the vdi??? I use the 3 tone as i hunt in a trashy area with a lot of aluminum trash. Thanks for any replies.
Tnredneck
Tnredneck