Originally Posted by ICANHITHIMMAN
Can you explain what you ment by this?
The concept of the Horus reticle is that it calibrates the entire shooting space in angular mils with no need to to move the reticle relative to the rifle for any shot. You just change the point of aim on the reticle. That's what gives the Horus reticle's simultaneous simplicity, accuracy, and speed.
A "long range" Horus reticle like the H37 or H25 has about 40 Mils of vertical calibration. 40 mils is over two degrees. If you reduce the magnification until you can see the entire reticle in the field of view of the eyepiece the magnification will be under 8X and the calibrations on the reticle become difficult to read. It's not practical to increase the eyepiece field of view and maintain a useful eye relief. That's only a problem when the angular drop exceeds a degree ( 60 MOA). Shooting at a mile with heavy bullets as with a 338 Lapua or 50 BMG shows up the problem. Also shooting at moderate ranges with subsonic bullets will give large angular drops.
Admittedly that not a problem at typical hunting ranges under 1000 yards with high velocity bullets where drops rarely exceed 1/2 degree.
If the eyepiece on a scope with a Horus reticle were made movable in the vertical plane behind the reticle , the eyepiece could be left at any magnification while any part of the reticle could be viewed. For most shooting the only area of interest is within a few angular mils of the target and point of impact. Many scopes which have target knobs have a two degree range of reticle elevation adjustment, but they all move the reticle position relative to the rifle when the adjustments are made. That works if the reticle is just a crosshair and you carefully count turns and clicks, but not if the Horus reticle is to be used the way it's intended.