In a SFP, the dots are only 'true' at a certain magnification, normally max power. You can work around that, as in set power at 1/2 max, and divide by 2, etc., and the same holds true for trying to dial based off of dot measurements at anything other than max magnification..Makes my head hurt, lol.
For a "dialing rig" , much easier / simple to ditch the SFP and go FFP or fixed power so that the turrets, reticle and dots all match.
