Fobb;
A lot of this depends on the action & barrel contour also. For a common gun like the Browning, most manufacturers can give you a suggestion as to which to get.
For instance, the Natchez master catalogue contains a large amount of info from Leupold, Weaver, & Burris, as to scope, ring, & action fit. I wouldn't be surprised if it isn't available on the various web sites also. I just prefer paper.
900F