Thread: 9.3x62 neck sizing

Originally Posted by stug

Try and expand but use a series of different sized expander a if you can.
To fireform you really need a false shoulder to keep the base of the cartridge back against the boltface or else you will get head separation issues later.

When you size the necks that much you can easy push the shoulder back

I would expand it up as Stug said, then make sure its not too short in the chamber, if it is you will need to false shoulder it.