is a different color from the others. As the Bushie is a second focal plane scope, the milling feature only works at one power setting. IMO that feature makes the scope very limited....you might as well have a fixed power scopes.
All really good variable mildot scopes are first focal plane (like Schmidt & Bender) so the milling feature is useable at all powers.
IME you can range with a laser rangefinder and get the shot off quicker using a regular scope than all the milling and knob twiddling that is cool but pretty much useless unless you are an constantly trained professional sniper.
I bought a 4-30x50 6500 mildot and while it is a fine piece of optics the milling feature is almost useless and it will be sold when I return to WY in June and replaced with a FFP scope with a simple BDC reticle.