The Zeiss has crosshairs with mil dots, and I started by sighting it in dead-on at 100 yards with both loads, using the intersection of the crosshairs. At 200 yards, the 85-grain bullets shot 3.5 inches higher than the 115s. At 250, they grouped only half an inch higher than the 115s. At 300 the two were even. At 350 the 115s were shooting a half-inch above the 85s**. Moreover, at 200 yards I could still use the crosshairs to aim with the 85s, but I had to use the first dot to put the 115s where they should go. Past 200 all aiming was done with the first dot. I expect that when I get out to 400 and beyond, I'll need to use the second dot, although I would have sworn I would have needed it at 350.