A box of $24.50 (instead of the usual $25.00) yielded...
303 Pre-1982's
14 Copper 1982's (the other 9 were zinc)
11 Wheaties (that included a 1936-S and 1939)
328 Total Coppers (13.4%)
Also:
3 Canadian pennies
6 Pennies from 2009 (only save BU's)
My copper percentages are very low partly because I am very picky about what I accept. I will not accept lots of coins that others might take for their copper stacks.
Funny story about the box- my daughter had it in her car for probably about 4 years. It was hidden in the back with the spare tire and she didn't see it until just a few weeks ago. She said, "Dad, I think this is yours." I said, "Geez, how in the world did you guess it would be mine?"