Originally posted by dpcd: If your brass is clean, some guys don't; I do. Try it and see how much force is required. I think it will still promote stretching if you don't. Collet dies, no.
Haven't had that happen Tom. Most I hardly have to press on the press handle. One can always buy bushing neck sizing dies with a titanium bushing. Easier yet. Then there are the LEE neck sizing collet dies. Those babies work very well!
I have used RCBS and Lyman neck sizing dies in many calibers since the 1970s. Never had to use any lube but I am always careful the first time to make sure I don't stick the case. I do like to use a little graphite inside the case neck so it slides over the expander ball easily.