I'm starting to think that Remington has dropped the "Express" line of ammunition.
The R30062 is an index number, which corresponds to a bullet/load/round count, basically identifying the product for sale. For example, I use Remington UMC 50grn JHP's out of one of my AR's for plinking, I buy the 40rnd box that says: L223R8B. I called Rem once about it because I could only find the 20rnd box on the shelves around, which is labeled: L223R8. It's the same load, confirmed with Remington, just a different packaging, hence the "B".
So I'd personally say that the R30062 refers to the Remington Core-loct 30-06 20rnd box with the same load, no matter what the box labeling looks like.