The show said there are often times, mill marks on the rings. I personally have never looked for them. And they explained that it will help you match up the base to the top and how it is supposed to fit. It was an interesting show. I'd hate to think how many scopes I have mounted over the years, and never once was I that careful. In fact the gunsmith whom I watched mount two scopes for me, never did any of that stuff either. But as they were trying to point out, the further distance you have to shoot, the more important it is to properly set the scope. Then they went into ammunition as a factor and were shooting Hornady Premier Cartridges.

It all ended with a person shooting a 300 WSM at 200 yards and had two touching and one just off the two in the bulls eyes. Very impressive shooting. It sure made me sit and look at all the scoped rifles I have.