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7 WSM Brass

Joe Cowan

Silver $$ Contributor
Sorry if this has already been discussed.

Can anyone lead me to where I can buy some 7WSM brass?

Thanks
 
I guess the default for quality 7WSM brass is still to neck up 270WSM brass or neck down 300WSM brass. It's a bit of a pain but you'll end up with good brass.
 
https://www.lapua.com/product/lapua-brass-300-wsm-cartridge-case-4ph7080c/ does this and a trip through a 7WSM die get it done or do they come out too short?
They will be too short. You need to create a false shoulder on the neck by only necking down enough for a snug fit in the chamber, Then, a fireforming load should get you where you need to be.

FWIW - I used fully prepped and culled Win brass with good results. It all depends on how uniform the brass needs to be for your application.
 
You have to leave a false shoulder so that they chamber with resistance.

I made my Brass from Norma 300wsm way before we had Lapua. The necks come out about. 02" short after firing. Not ideal because 7wsm necks are shortest of all wsm cases to begin with.

The ideal scenario is chamber a 7-300 wsm.
Yes, my understanding is either 7-270 wsm or 7-300 wsm. They should end up the same, however you can end up with a thicker neck using 300 vs 270 brass. If you’re going through the work to order a custom reamer, I would go the 300 brass route because it’s now available from Lapua, and order the reamer accordingly for neck thickness. Then use a 300 wsm bushing die with smaller bushing for sizing.
 
The 7WSM is the pick of the litter in my opinion, but the brass situation has always made me say no. I wish it weren't so.
 

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