Neck Turning with fired brass?

[FTRinTexas]

I want to do a second pass of neck turning on some fired brass. Is my only choice to use a straight F/L die, then an expander mandrel die?

 

[timeout]

Don't claim to be an expert, but that is how I would do it. A bushing die would leave a step. Depending on the fit of fired brass to your neck turn arbor, you may be able to do it freshly fired.

 

[jlow]

Your other option would be to size first with a Lee Collet die before the expander mandrel.

 

[mikecr]

It would not be easy to fully restore neck shape, and good turning mandrel fit, once fired.
With this, I don't see how you could improve over initial turning.
You should never have to turn again

 

[Martin52]

That's what I would do, use a FLS die then expand the neck of the once fired cases. Trim, chamfer then turn.

I use a K&M expander and don't see a problem doing this.

I assume that you have given your new brass a skim for the first firing then have to do most of the turning after it's fired for the first time.

I am just changing my own process, I used to turn brand new brass, now I prep the new brass, fire it then do the turning - but turn only once, using a FLS and expander, not a bushing die for the reason above.

Martin