If you have dialed your scope to optical zero. Did you need shimming?
I just did my optical zero and was @ 22m 1cm high and 2cm left.
Counting the revs on turrets and dividing by two probably wont be optical zero.
You need V blocks and the rotating of scope within to set.
Now all scopes are different, some require tilt some dont.
I know of one scope in use over there that will require 3.6mm tilt over 150mm whereas other require nothing, see the point!
Theres no point making or buying a rail to find out its wrong. Ideally need to try scope on said rifle and shoot at your zero, see where it lands.
A suitable rail can then be made up by a competant person to compensate for this error.
The only other way is adjustable mounts but there again all rifle manufacturers cut their dovetails different both in width and depth. A few thou its real sloppy, not good even when clamped.
If its going to be made, do it right ro not at all.