neck turning

You can neck turn new brass just fine. Have to use an expander for sure, which you can sometimes skip with fired brass.
 
It probably wont matter too much either way, assuming you have a good gun. But the safer route is too fire form first. You want the shoulder to blow out to chamber dimensions before neck turning so you turn the neck not too far back or too little. I assume you are also doing neck/bump sizing only?
 
Would be a good idea to full length resize before outside neck turning. A trick to eliminate donuts at neck/shoulder junction is use ground shell holders to set shoulder back a few thousands, this allows outside neck turning of the shoulder/neck junction. When neck and top end of shoulder are same thickness there's no excess brass to roll into neck. To compensate shoulder setback neck cartridge up one caliber then neck down carefully until you can feel cartridge fit is snug.
 
curseyou said:
It probably wont matter too much either way, assuming you have a good gun. But the safer route is too fire form first. You want the shoulder to blow out to chamber dimensions before neck turning so you turn the neck not too far back or too little. I assume you are also doing neck/bump sizing only?
Click to expand...

neck /bump only
 
I have turned both new and once fired brass and I have better luck with fire formed brass sized (neck bumped) to set head space then turn.
I get a better and more uniform neck thickness.
It seems to change after the first time you fire a case if you turn new cases, I end up doing it twice.
But that is what I have found.
David
 
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