James Eagleman goes over Truing Ballistic Coefficient or Velocity

Do you ever need to tune shifting zero offsets?

I ask because with a Garmin or LabRadar, I believe my velocities are spot on. G7 BC can be adjusted, but have more impact farther away. Zero shifts seem to help dial in mid range.

Please understand I'm asking a question. I lack the experience to even share this as experience! …but my own trials tell me to shift my zero.
 
The BDX app you show has a few more data entry fields than mine. Is that related to the Kilo 10k? More options available depending on rangefinder used?
 
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