DeanC wrote:It won't hurt anything to lube a straight walled pistol cartridge now and then and it might make things go smoother depending on how well the factory finished the carbide ring in your die.
I disagree, in that it could hurt A LOT if you lube a full power 44 mag or 454 Casull load and forget to get all the lube off of even ONE case, and a full power 10mm load in an auto could be nasty too. I have yet to run across a carbide die that is so poorly finished that it causes noticable drag on the cases. This is probably because the carbide itself has to be diamond or CBN (cubic boron nitride) ground to dimension, as it's impossible to machine tungsten carbide like you do steel. Yes, there are poorly finished steel dies out there (and the Lee expander dies are the worst!!), but not carbide dies. In addition, tungsten carbide is quite slippery in its own right when polished, so I don't think there's an need for lube ever with a straight walled carbide die.
And lubing straight walled cases is a PITA, and wiping the lube off with paper towels is a PITA, and using a towel will eventually get you to the point where the towel has as much lube as the case, and the same goes for tumbling media used to get the lube off. the way I do it is to wash all the bottleneck cases in a collander with dish soap, and then let them dry from the heat of the pilot light in my gas oven. It takes a while, but you'll never miss a case and the lube is gone forever and not hanging around on a towel or in your tumbler.