"So then theres really only 2 ring sizes, large and small? Because the "intermediate ring" has a shorter action,but has the large rings? So its large ring? "
Yes, that is correct. As I said, "intermediate" really only refers to the action length. It is a misnomer that it has anything to do with ring size.
But then, my 25 years of experience with these rifles qualifies me to know absolutely nothing about them.