Much as I like having a chrony to get idea of velocity you still have to validate drops at various ranges. So I still tend to do it the old fashioned way. Sight in @ 100m, check drops out to max intended range, compare with ballistic program and tweak inputs till everything matches. Works well enough for me but then I generally keep shots to under 500m these days and to be honest most animals I shoot are under 100m.
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