Since I have the 'open sights' set to hit POI at 100 yards, and wanted to go with a good detachable mount, so I checked with Talley to get their recommendation.Originally Posted by Festus
I also wanted to make sure I got the correct 'screw spacing' for the front and rear mount, as it appears the rear mount has a .330" spacing while the front mount has a .860" spacing. Apparently this is the common setup for the 'post-64' long action magnum. (Picture shown below)..
They recommended the PN 25X701 extended bases (extension on the front mount) and the PN 200003 1" low rings. The rings are detachable, hold their 'zero' when remounted, but use set screws instead of the lever version.