In the kit you get a full length sizer and a collet neck sizer. Lee told me you use one OR or the other, not both. They also confused me with when to use one or the other. 

 

Anybody have a clue for a dummy?   My brass is (CMP) once fired from a Garrand. So which sizer and why. Thanks.

 

 

Resizing brass for semi-autos is with full length resizer.  This allows easier loading of rounds.  Neck sizer is for bolt actions.  This is done for accuracy. 

Right and neck sizing is only if you are shooting it in the same exact bolt action rifle that you fired it in the first time.

 

The lee reloading manual is a good read it explains everything I recommend you read it first before doing anything.

 

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to elaborate on kman's post, if you did not fire the rounds in the gun you are re loading for you must full length size.  If you have already fired the rounds in a bolt action rifle and are loading for the same rifle you can neck size only.  Just neck sizing slows down brass stretch, extends brass life, and reduces trimming frequency.

Ken

Thank you. Really appreciate it. Youse guys are Dudes!