Get rid of them. Everything I'm finding says that they are inferior and were loaded with corrosive, mercuric primers.
Corrosive isn't an issue, but the mercury in the primers is a big issue.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.