The size of everything changes when you change the power. What you need to do is put a 36 inch ruler at 100 yards, but first mark it at 3.6 inches, then your top mil dot and your bottom mildot will line up with the top and bottom of the ruler and all of the other mildots will line up with one of the 3.6 inch marks at the correct magnification. To figure out which mildots line up with the different ranges you have to use a exterior ballistics program and fill in the zero range for the distance you are going to shot and than look at the number of inches that you are over at the 100 yard scale and that will be your mildot location. Example: my 300 yard zero produces a 2.5 inch bullet path of the 100 yard zero, if I used the 300 yard zero and shot at the bulls eye I would shoot over it by 2.5 inches. The 400 yard zero procuced 4.25 inches over target for my 338-378. your mildots are 3.6 inches apart so a 100 yard zero on this gun I would use my 1st mildot for 350 yard zero, because that would put the mildot between the 2 bullet holes. you would use this comparison for the rest of your mildots. Mine equals the following 1=350, 2=550, 3=650. 4=800, 5=900. Mark a target with these spots on it and line up your mildots for what ever magnication you want to use. Dan
