Kinda depends on the distances you test at, as well as the accuracy of the chrony, no ?
I think the vast majority of guys test at ranges of 200m or less. Not optimal for confirming LR drops.
Also, unless you spend serious $$ and are every careful about setup, I am not sure how accurate the average chrony is.
If your drops don't correspond to what the calculated trajectory for chrony MV is, which variable do you change ? MV, atmospherics or both ?
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