A variable power scope (in my case it's a tweaked Hamr given zoom capability), when looked through will always reset to the default magnification/zoom level, regardless of what the magnification was previously set to. Reloading the weapon also causes a reset to default magnification.
Additionally, reticles remain the same size throughout the magnification range. While this is an accurate representation of how second focal plane reticles work, and indeed most American scopes use reticles on the second focal plane, in the rest of the world, those types of scopes are uncommon. First focal plane reticles are also ill suited to military applications due to rangefinding being dependent on the scope being set to a specific magnification.
For most of the world, and for most military applications, variable power scopes use first focal plane reticles. In a scope with the reticle on the first focal plane, (lets assume a mil dot reticle for the sake of example) the mil-dots always subtend the same angle, regardless of magnification. As the magnification is increased by the user, the reticle appears to zoom with the image. This is essential behavior in tactical applications as it allows reliable rangefinding, holdovers, and windage adjustments to be made at any magnification.
In summary, please ensure that chose magnification is retained between changes of optics modes and magazine changes, and please provide the ability for the reticle to zoom along with the scope.