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Old 02-10-2010, 10:20 PM
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ar15barrels ar15barrels is offline
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Originally Posted by DirtRacer151 View Post
Ok so providing the virgin brass will chamber in my gun (when its done) i should just adjust the die out so it doesn't bump the shoulder and with no bushing inside just so the expander will open them up and then measure the loaded rounds for the bushing for next time?

Im what circumstances would i NOT want the expander? It would seem that even when neck sizing that the expander would ensure everything stayed round incase the cases were dinged up after ejection.
You could leave the die 1-2 turns away from the shellholder for neck expanding purposes.
You won't need to move the shoulder back.
Bring a few cases when you come for the barrel install so I can make sure to chamber deep enough that new cases fit easily.

Once you fire the cases, you will remove the expander button and use only the bushing to re-size the neck diameter.
The case mouths end up being round after the busing sizes them.
At this point, you will also want to properly adjust the sizing die to bump the shoulder back 0.001" or so.
Randall Rausch

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