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Curious what folks are doing for brass in this chambering? Necking down 300 WSM to make a false shoulder and fire forming?

David

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Originally Posted by Canazes9
Necking down 300 WSM to make a false shoulder and fire forming?

David



That's what I'm doing.


59.0grs IMR-4350 and something that weighs 140grs is very accurate and makes great brass.


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Bunch of factory Winchester ammo up here so no shortage of brass.

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Appreciate your responses.

David

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Originally Posted by Canazes9
Curious what folks are doing for brass in this chambering? Necking down 300 WSM to make a false shoulder and fire forming?

David


Yep. WW .300WSM brass isn't that hard to find around here. It sure would be sweet if Lapua jumped on board one of the WSM's, though.

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I tried necking down Winchester 300 WSM brass with a mid-range load and bullet hitting lands - to keep the base against the boltface. Wound up with cracked and split shoulders.

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Gotta anneal first


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