On another thread, there is a discussion of BHN of COWW alloy. This thread raised my curiosity about the hardness of an unmelted, as-is wheel weight. In order not to hijack that thread, I'll list the information here.
I found a new-looking clip-on wheel weight in a bucket that I got at a tire store yesterday. On one side, it is marked 3.0 P 85 in raised letters. It passed the "side cutter" test, and I'm assuming it's a lead weight. It is 5 1/2 inches long.
I indented the weight in 5 different places with my Lee Tester. The average of the results was 14.5 BHN. The magnifier was in an awkward position, so I made 5 measurements to get an average.
Reports are that BHN of clip-ons is somewhat variable; therefore, this test is not all that meaningful, but it satisfied my curiosity. Perhaps I'll measure a few more at some point and see what gives.