I just sorted some COWW and used a sidecutter to test for zinc weights. Some COWW were very soft, and cut easily. Some COWW were so hard that I couldn't cut them.
The confusing ones were the ones in which I could cut into them, but they were harder than the soft COWW. Am I correct that I shouldn't be able to cut in to zinc weights at all? And if so, are the harder (but still cut-able) COWW some sort of special composition? Often these harder COWW seemed to have some sort of coating on them. (They were not plastic weights, which I also found and rejected.) Should I treat the harder COWW the same as the softer ones?
Thanks for the help!
Glenn