I just started into a horde of cents that is yielding 60%+ cu, with 4 to 6 wheats in every handful.
A lady I know and work for has a giant floor vase in her hall where she has been dropping all of her pennies since 1965...59 years!
It's so strange finishing a small batch and seeing the copper pile bigger than the zinc pile. I took 2 Home Depot buckets home with me to work on, maybe 5000 coins in each, and I barely scratched the surface. The best ones are still in the bottom
Found a decent 1972 doubled die (die #2), would probably grade XF. The photo was hard to manage what with the cellphone, loupe, and lighting...but should give you an idea.