I have several M8 6M scopes so I pulled the literature out of one of the boxes. If it is a target scope with turret gradations the major lines on the turret adjustment are one minute and the minor lines are 1/4 minute. If it is a hunting scope without the target turrets the line increments are 1/2 minute. I didn't see anything about the X9 question. The information applied to all Leupold scopes at the time the M8 was manufactured so it was in general terms. Hope this helps.