Trapper7,
CONGRADULATIONS on your winning ticket!
I am not sure about the proper primer for the 300WSM; I suggest you get hold of current loading data and be guided accordingly. You may be able to Google Hornady or Sierra, etc., and printout reloading data for your rifle.
I also noticed the new magnums have no belt and the fact seems to be they were never needed from the get go for the 7mm RM and others. Lack of a belt makes for easier handloading. I load my 7mm RM by backing off my sizing die and size to the shoulder for longer case life.
Adam
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Adam Helmer
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