I've heard of guys don't bother to lube cases that are only neck sized. I started w/ a Lee hand loader and never lubed any .270 brass that I knocked into that die. And I am stll using the same brass (loaded close to 10 times)!

These days I am using an RCBS neck-only resizer die for my .243 and wonder if its necessry to lube and if I should what's the best and cleanest lube to use and apply?