Re: CGR owners ...
I don't have one myself, but from what I've read about them, if they have a single line designation .. that's the size you should use.
If they have a double line designation (like 5/6) the lower size is the more popular.
I have a lot of the vintage glass rods and while it's not a solid fact, the faster rod action that most people are comfortable with today requires using a lighter weight line than what's indicated on the rod.
The simpler the outfit, the more skill it takes to manage it, and the more pleasure one gets in his achievements.” --- Horace Kephart