A RC - Release Candidate - is a bit beyond beta. It's the step software takes between beta and production. Typically, it's a code complete version of the product that's gone for rigorous internal testing. It is not uncommon for software to go through multiple release candidate versions - but as the name implies, it's so close to ready that they have a version they're considering releasing.
It means the project is feature / code complete. The developers are happy with it. The product manager is happy with it. It's just being vetted.
Does that help?
It does help.
Of course I realize that they have internal betas before the public ones. So a RC in Kemper fashion would be first released as a public beta once they decide it, and if everything goes well they would elevate it to a Release version.
So, in real world out of Kemper offices it means that we are close to a beta release.