If you keep good records and can paste pictures in a horizontal string you will discover if you have enough, with left wind, then 12 o'clock, then say 1 o'clock, 2, 3 etc captured on different days a general theme emerges as to how much your rifle will deflect shots based on strength and direction. You see its those odd ones you lose or catch you that you can turn lemons into lemonade to know in advance what to expect. Good coaches will screw you up and down on strength and direction as well as sideways if they know what your tune is.
A clue as to how much to move when mirage is not a factor is in the ratios of group height to width. You have got to average things out over time to see what happens. Its to complex to go into now, but light and mirage factors need to be subtracted to find how much left wind lowers you and right raises you and of course in reverse when you get a drop off.
The amount will also vary on the day and groups tend to hollow out at 1000 if the air density changes a bit because it alters the amount of bullet lift. This means you must manage a larger group and so knowing the slope of how your group forms from different wind directions and strength will help you. This I am sure Cam was a master, together with his ability to tune to know his base.
Your short range will give you a tune that will carry forward, but you have to know when a tune is not doing the damage. At 1000 thousand yards the slope of groups is different due to the downward path of the trajectory. It was a pity, Adam was not able to post a thousand yard profile to see the continuum of his rifle. His upward slope was different due to trajectory influences. On some ranges of course the slope of the land will counter left wind lowers or right wind raises. Understanding why helps.
Did you see a patter from your last group emerging?
![Image](http://i1373.photobucket.com/albums/ag369/sierra39/Plumbs%201000%203_zps8xucs41t.jpg)