went out metaldetecting today. might be the last day for it in upstate n.y.. using dfx DD1400 coil.detected my front yard which i detect almost every day.havnt found much in a while .decided to dig some targets that give a good signal 1 way but not the other. dug a 1957 canadian penny and a matchbox doing this. i never dug these targets before because i was told that they would be iron.i can see the coin doing this maybe it was on edge.so maybe anyone reading this should dig up the targets that signal good just one way.any thoughts on this.