OK, I think I got it
I agree it's a small value but I can measure it and verify it so why not, it was not long ago when Coriolis was the big non issue and guys shouldn't worry about it but when you look at it is a factor that one can dial so it needs to factored in when ELR shooting. If I'm shooting far enough to see a difference in the correction the program gives me so I want to nail it down.
I tested optics that were way more of, this Sightron Slll is the tightest I've tested so far.
My test rig allows me to set up the optic in the rings it's going to be mounted one the rifle with so I can test the value of the turrets, set it to dial vertical and lock it in the rings then set the scope level then transfer it to a rifle ready to rock.
The rig has allowed me to dial up and down 80+MOA and check repeatability multiple times with accuracy at 300ft from the target face to the center of the turret, I repeated the test at different power levels and it does not change the value.
I tested an optic that was way of but I've worn 4 barrels out shooting under it and I know what it is, in a half hour with no shots fired I tested it and it came out to the same value I've been using from trial and error. So if I test every optic I instal it will just make life go easier and barrel life can be used on important things!!
I know if your value is of you'll fight velocity and BC trying to get the trajectory right but it will screw with you till you find the value!!