Once you get a load sorted & zeroed, chrony it to get the speed, plug all the data into a ballistic App, you need a good quality dial up scope, most will then go shoot it at a few distances (say 500, 700) and see how that compares to your chart & adjust it from there.
Norways vlog has some excellent info https://youtu.be/YKmKGyWfLKU
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