There are other benefits to lubing all cases when sizing (Neck or full length). When sized without lube the Press stretches a few thousandths more than normal and case length is different than when using lube. The friction between the die and the case Stresses everything more and the outcome is always different.
I know this because I didn't like lubing every case because of lube build up in the dies. So I devised this method of lubing one case and then sizing cases until it became harder to size (Normally 2 to 3 cases without lube).
If the 3rd case was noticeably harder to size (Bigger cases reach this point in 1 or 2 cases without lube) I just cut back on the un lubed number.
I really though I had cut a fat hog because there was no more lube build up in the dies and dimpled case shoulders. (Wrong)!
I always do minimum sizing whether neck or full sizing to get the best fit, so I was surprised that some of my cases would not chamber as they should. After measuring some of them from the neck/ shoulder junction to the case head, I found that some were longer than others.
So I went back to the beginning step and size some once fired cases
with this new procedure, checking length as I went. What I found surprised me to say the least. I have a very strong press and good dies
but found that the first case with lube was the shortest (Measured at the neck shoulder junction giving me a better handle on case size than Case overall length).
The first un lubed case was only slightly longer and the second case without lube was several thousandths longer. By the third case with out
lube the case length had become very tight in my chamber.
The lesson I learned from this was, Which ever method you use be consistent and don't screw around and change in the middle of a run. and also use sizing lube sparingly to prevent build up in the dies.
I understand why some prefer not to lube there cases, but the benefits
far out weigh not lubing and not having to clean up the cases before loading in my opinion. And the sizing consistency with lube is far better and easier on your equipment.
J E CUSTOM