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Deleted member 48126
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Thats not true - all the bdc is just holdover lines. My strelok pro app has a ton of different reticles loaded in it and you can input all of your data and it will give you the yardage for your bdc lines.
Same with the Nikon spot on app. Litehiker has a valid point though. Without technology the BDC has too much room for error. With technology though, aka phone apps, that error is removed.