Were the sights modified from the original configuration? Any idea of the zero used? With Mr. Linebaugh's skill, a 100+ yard zero wouldn't be too close (also zeroed at 9 yards). My ballistic research from Real Guns shows only 4 inches high at 60 yards for an 18 inch drop at 170 yards, 106 yard zero, using 400 grain Hornady XTP at 1100 fps as an example. I carried my 4" S&W .44 Mag Mountain Gun for brown bear last Spring, with Garret 325 grain hard cast bullets. Of course, I did have my .416 Taylor for "backup"! This bear hunt was way too cool! Congratulations!