L.Brown - that seems reasonable - maybe this is why the guy sold me Skeets cheap!

Anyway, it's not the end of the world since I also have a Bowers gauge in my machine shop. That reads to a tenth and goes in about 4 1/2-inches. It is more cumbersome to use and I won't take it to gun shows but I can still measure.

The lesson, I think, is to make sure the Skeets works when you get one and if not return it.