The Hornady manual I purchased in 1978 refers to full length sizing for minimum headspace. In any case its just a matter of semantics. I would suggest that those who only neck size keep the bolt lug faces well greased.
Depends on the brass and sometimes the chamber.
I can’t ever recall needing to bump the shoulder with WW brass until 2, 3, or 4 firings. But my Lapua brass needs bumped after every firing. This includes both brands of brass fired in the same rifle.
See page 42 in Nosler manual #6. I know PFLR is described in other manuals also, but this is the first one I pulled off the shelf.
