I am going to go ahead and mount it. Cabela's is only about 20 miles away and the salesman told me if I don't like them I can always exchange them. I guess I would like to keep my open sights on the gun since we to use open sights during muzzleloader season so that might be a consideration also.
The difference between the mediums and the highs can't be more than 3/8 of an inch but I'm sure that can make a difference.
Thanks for the help,
Art