I'm not reading all of this but it reminds me of something I had 30 years ago when I was in middle school and getting into coyote hunting.
Leupold used to have (maybe they still do) a magnetic 'boresighter' that would attached to the end of the barrel and sit high enough to be viewed in the optic. looking through the optic you would see an X, Y grid with numbers and letters. You could mechanically zero your optic to that grid and go to the range. It would 'mostly' be on paper. After getting an actual zero, you could reattach the thing to your barrel and look through your optic and see where your crosshairs actually were on the X, Y gid. Write down that zero for that rifle and that ammo combo, B4, or -A9, whatever it was. Now you have a reference for that rifle/ammo combo and it's 'zero'.
I had a notebook that I was building data with then I lost the damn thing.
not sure if this is even inline with what's being discussed here because I'm not reading it all.
Leupold used to have (maybe they still do) a magnetic 'boresighter' that would attached to the end of the barrel and sit high enough to be viewed in the optic. looking through the optic you would see an X, Y grid with numbers and letters. You could mechanically zero your optic to that grid and go to the range. It would 'mostly' be on paper. After getting an actual zero, you could reattach the thing to your barrel and look through your optic and see where your crosshairs actually were on the X, Y gid. Write down that zero for that rifle and that ammo combo, B4, or -A9, whatever it was. Now you have a reference for that rifle/ammo combo and it's 'zero'.
I had a notebook that I was building data with then I lost the damn thing.
not sure if this is even inline with what's being discussed here because I'm not reading it all.