I have a 7 WSM and enough brass to last a while but if I were to do this from scratch today, I would go with the 7-300 WSM due to Brass availability you can use 270 and 300 WSM Brass, 7 WSM is really hard to find and 7 saum is next to impossible to find. Even Remington stopped chambering rifles in that caliber over 5 years ago, and if it wasn't for bench shooters and they aftermarket would have died and gone into obscurity a long time ago.
Dean
Really? I find tons if both wsm and saum. Necking them down from .3 and turning the necks is all that is needed as far as I know.
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