I'm a noob with a 250 myself, went out a few times - some in productive areas and some in random areas in the woods just to see if anything would ping. ( found a .22 (I think) bullet, not the shell, but the bullet, it pinged as a coin, found an old shell casing, have no idea what is is - looks like a "wolf" brand casing has a W and a T on it, nothing else. Bent all to pieces too, anyhow, what I've noticed is it will falsely ping as a coin due to swing speed and direction. If you're not sure, swing slower in both directions and then swing front and back. If they vary then a lot of times they're junk. - Like I said this is my limited experience talking so if anything I said is wrong, please say so as I would like to know also. Relic wise - I have no clue as I have yet to go anywhere where I can do that, but I do have a friend that has one Civil War house burnt down on his place and another that is still standing/being lived in and is going to let me "play" so to speak. Anyway, as of right now I still dig everything as I am learning, and you never know.