I went with Century 21 expander mandrel and forgot about the Wilson. The C 21 offers a variety of sizes and seems to work well so far. I am sure the Wilson would have been fine, but in my mind I did not want to go with it. And, shooting is as much mental as it is anything. You can aim small hit small. You can have the best load ever created. If you mind is not right, you might not hit a bull in the a$$.