Frank
Not quite what I said... or at least meant to say ;D
A die, shoulder or FL, will only bump the shoulders as much as you let it Proper set up is key.
Forget the generic instructions that come with it. They both/all need to be set to your chamber.
No two chambers,dies,shellholders are alike.

What I meant to say is "some" necksizing fans let thier brass get overally long in the headspace department before resorting to the dreaded FL die. This now requires a larger bump to get back to chamber dimensions.

My personal parameters are simple. If I can feel my brass while chambering its to big. If my comparator says I'm bumping more than .002" on "slight resistance" brass I'm sizing too much (or) theres a bad mismatch between chamber and die.


I should concur with mikie.
A shoulder bump die should be just the ticket for most sane loads and brass thats never been horribly abused with pressure testing. ;D

Given those two parameters FL sizing should'nt be required for a very very long time. If ever.