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Old June 25, 2013, 03:55 PM   #9
Senior Member
Join Date: October 18, 2006
Posts: 7,089
I am asking you .308 experts if this is excessive exapansion or is this normal for a factory chamber?
Quite normal. SAAMI specs max neck diameter for 308 loaded ammo at .3433" that your fired brass measures 0.345 is well within spec.

Machine guns are awesome until you have to carry one.
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