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Old August 28, 2015, 02:34 PM   #4
T. O'Heir
Senior Member
 
Join Date: February 13, 2002
Location: Canada
Posts: 12,458
7.62x54r doesn't have a .308" neck. Uses a .311" bullet. 7.62mm doesn't always mean .30 cal. Doesn't mathematically convert to .308 either. So a universal .30 calibre neck sizer isn't for 7.62 x 54R.
Considering the cost and availability of .30-40 Krag brass, you really don't want to set up a die by trial and error. You may want to re-think a universal neck sizer for it too. However, you do have to adjust the thing for the neck length. You will need to FL size any new brass and any brass fired out of another rifle anyway.
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