Yo rip - some old Rr lines have goodies waiting. There will be lots of junk in between as posted . We have specialized in old RR lines for many years now, with lots of finds. The date nails were started in the US in 1899 and pretty much stopped being used about the 1950's, some sooner. While we have used our detectors for finding things ,the greatest luck we have had was sifting the old dumps with a screen. Good luck whatever you do. Steve in so az