Can anyone confirm on Blackhills 300Wm brass?

1Sg (ret)

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Minuteman
Oct 12, 2010
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I have looked on the net.It seems that Blackhills uses Norma and Winchester brass to load 300WM.Does any one know for sure?I have some Blackhills oncefired 300WM brass .It doesnt look like Winchester to me.It weights 220 gr.Does anyone know what Norma 300WM brass weighs.Thanks in advance Richard