Thanks Pete, that is what I thought. This was purchased very reasonably many years ago before I (somewhat) learned enough to know what I was looking at. Always wondered what it was. I have read your article....very helpful. I just never encountered a seam like this after this one ball. I have 24 pounder shell molds here and don't see how it would be possible for a band or seam such as this to occur in casting. If I ever encounter an actual 18 pound shot, I will probably pass on it just out of caution because I have seen so many that were not the real deal.....one recently from a very reputable dealer who of course made good on it and that was an honest oversight. Thanks again for your input.