I have done exactly this, resizing primed 30-06 brass to 35 Whelen. Depending on what brand of die you have, the decapping pin ay be part of the expander ball, so it is not removable. (I have many Lee dies that are set up like this). Other die sets, the decapping pin in a separate piece that can be removed (I have an RCBS set like this). I use a lube that claims to not affect powder, so I don't worry about removing lube from the inside of case. If you wish to remove the lube from the outside, I sometimes dry tumble the completed cartridges. You do not want to dry tumble just a primed case, as the media can clog up the flash hole and you would never know it until the cartridge didn't go "bang". Of course, some say that you should not tumble complete cartridges, but I will leave you to do your own research and make decisions on that.