Vintage Brass rifle/ pistol shells many different DUG - not useable. - $20 (bristol ct)

For the student of rifle shell collecting, i have a bunch of old shell brass for your consideration.
I am a metal detectorist and saved the dug brass shell headstamps from my detecting.
You can clean and collect them.
I have 4 pounds of them currently.
Found mainly in woods/ reservoir/ lakes, these are spent rounds.
A bunch of this is military related.