So, you are using Redding dies, and an RCBS shell holder. What is the problem / question? I don't see any reason why there would automatically be a problem, should work fine.
I don't know about the redding dies but the RCBS dies have a hole through the shoulder area of the die that is designed to let the excess lube leak out so it doesn't dent the case. That hole can become plugged (sometimes just with dried up lube) so you have to ensure it is clear. A paperclip or small wire works fine. If that hole is plugged the brass will dent even if there isn't too much lube.
Cheers
Ahlsy