Sure Shot,
Outside of you and I, I'm not aware of anyone else who even has these anymore, let alone, use them. I know they were current, not to long ago but sure if you can still find them. I have shot them but most of the time, I'd rather use the patches. As I said, I still have some as well as given some away and will have to dig them up and see how the packages read. ...
A reported common problem is there use with pure lead balls as they would come loose. Hard balls were suppose to be used with these. I never encountered that problem but some had and reported that they were not safe. The combination is suppose to provide increased accuracy. ...
Here is what we are talking about; ...
http://www.midwayusa.com/viewProduct...tNumber=730268
Might add that the ball cup is a perfect fit on the ball. ....
Be Safe !!!