If you use Microsoft excel, make a chart like this
Select all cells, change size to what ever unit ie I work in moa so cell size is 1.047", I think your in mills...so that's easy 1cm.
Set it up at 100y or meters and dial. You don't have to fire a single shot, and it will tell you what your scope is tracking like.
Kj
Note, you'll need to use a level to set it up straight in all directions. Photo was taken during setting it up.
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