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Ok, what am I doing wrong - necking down 7mm Mag to 264 WM

Bbear

Well-Known Member
Joined
Mar 13, 2007
Messages
318
A friend gave me a partial box of brand new Nosler 7mm Rem. Mag brass to use in my 264. The first few I ran through the sizing die have the dreaded doughnut at the base of the neck.

What did I screw up this time? Or, did I just not hold my mouth right?

Any help appreciated.
 
You can expand and fire form out the thicker brass. Speaking of that, sized down necks are thicker across the board. Do you have enough neck clearance for this?
 
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