2+2=7, but WHY? Expectations vs reality.

[bellavite1]

That is why I double checked my data outdoors:

Shooter App acquires atmospheric data based on your GPS from the nearest weather station.

Obviously, if I am indoors at Blucore, air pressure and temperature will be different from the data provided by the app (the app will give data for outdoors, at that location).

And yet, the indoors tweaked velocity worked quite well outdoors this morning with minor adjustments on the 300BLK Sub (1220 fps vs 1240 fps indoors).

The Supersonic loads required no further adjustment to the velocity.

I mean, it works.
But I wish I could understand the "mechanics" of it.