totally dependent on the length in between the bases, and now, it also totally depends on what kind of movement you can have in your scope!
do you know how many clicks it is back for the scope to be centered vertically?
measure front of the front ring to the front of the back ring. That will give you a rough ctc measurement. If you are 4 inches low at 25, and almost a foot at 100, then you need somewhere between almost 12 and 16 MOA to zero. You gotta add to that how much you've already adjusted out of your scope.
According to bushnells website, that scope has 120 MOA adjustment. That would be 60MOA up and 60MOA down. Lets figure this is a perfect world, and just go right in the middle, that you need 60 + 14 (right inbetween 12 and 16) MOA. 74 MOA adjustment required.
Lets say CTC bases are 5.1 inches apart as per bushnells website.
5.1 = diameter of imaginary circle.
5.1 * 3.14159 = 16.022109
16.022109 = circumference of our imaginary circle
16.022109 / 3600 = .00445
.00445 of shim would equal 1 MOA.
you need 74 MOA, 74 * .00445 = .329"
Now, all the ifs for the prior info: If you are currently out 14 MOA, and your scope is 60 MOA from center.
If your bases are 5.1 inches apart CTC.
Let me know if you need another calculation done
Good luck!
ps. .329 is a hell of a lot to shim. Will be bad for the scope unless you have a 1 piece base, or burris zee rings.
well i think I'll go and have rye now, maybe it will help me understand this
