I have my first set of Warne rings on my CZ 550FS 9.3X62. They work great. They are not lapped, reamed, blueprinted or treated with any other type of magic. They are just properly installed by someone with a lot of experience mounting scopes. Good quality mounts: from American Weavers on up should not require anything but the proper tools and some knowledge to provide the maximun accuracy and reliability from your choice of rifle and scope.
