Norma 300 Win Mag Brass

You will find neck tension is rather tight, you will find the primer pockets tight but overall the brass is very consistent.
I run mine over a mandrel now, but before using mandrels I had neck dies with modified expanders and ran the brass through them, it would only neck down .002" and bring it back .001" for my final interference fit.
I only run .0015" tension in my 300's, except for one barrel that likes .004" for some reason. It was very finicky until finding this.
I also do a skim cut on the necks with all brass. This may not be necessary in a hunting rifle.

Cheers.
 
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