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20 BR

My barrel is a .236" no turn neck although I've heard of .237" necks as well. Mine is a 1:12 twist so I'll leave the freebore for somone else.

FYI, my brass,Lapua) went from .013" neck thickness to about .014-.0145" after necking down.

HTH
 
i have a 235 neck but i turn my necks i just clean them a little bit i also have a 1&9 twist barrel 50 bergers shoot great.
 
kochie,

What velocity are you getting with the 50 Bergers? I can't decide which way I want to twist mine. Have you tried the 40grs and if so, how do they shot in the 9 twist? Thanks
 
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