RE: Intermediate ER Scope
An intermediate rifle scope is going to be a "scout" scope. A shotgun scope will generally have a little more eye relief but you will usually have to settle for those "shotgun" reticles.
A scout scope is just a name they give the extended eye relief scopes because that is the type of rifle they usually sit on. Just about every one makes an EER rifle scope or three. Nikon, Burris, Leupoold, etc... Most will have between 8-10 inches of eye relief.
As far as range of eye relief you basically have three choices....... rifle scope, extended eye relief (scout) scopes, and handgun scopes.