What does your piece read as on your detector? Iron? Nickel? This is what I found doing some googling...:
"For more research, you may wish to look into the life and discoveries of a pioneer meteoriticist, H. H. Nininger. One of his books, 'Find A Falling Star', is a semi-biographical work with fascinating accounts of meteorite finds and falls in the early to mid-20th century. Composition? Iron, Nickel, Olivine-fairly easy to find with a metal detector. Clear skies!"
I hope is really is a meteor! They can be very valuable! May be worth getting checked out by a geologist!!! Kept me informed, as you have me. Curious! Good Luck