The problem with work hardened brass is spring back. Brass should be annealed at least every 3-4 firings at a minimum to prevent this.

So anneal then FL size to a .001-2 shoulder clearance for your chamber using your regular die and see if that solves the problem. It should, a SB Die is not the answer for work hardened brass.

If the brass is annealed on a regular basis you should also be able to use the Collet Die in a Bolt Action Rifle. You do have to have the procedure down to correctly anneal the brass though...I have seen a lot of confusion about that.

I don't use FL sizing dies in the normal manner and never use the expander button on the upstroke, normally I just use a Collet Die and a body die only when necessary...proper annealing will ensure all of these options will be available.

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