Hello Dan,
First off Dolan Dave is absolutely credible and correct, not a meteorite, secondly, you contradicted yerself with the " metal detector screams an non-ferrous" statement.
Meteorites are only found with md's because they contain percentages of iron alloyed w/ smaller percentages of nickel. Or they are entirely composed of iron. A very, VERY small percentage have no iron all, those are cabonacious chondrites, and martians and lunars, and these need extensive lab testing to be identified. Good luck.
RH