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Old March 5, 2013, 10:03 PM   #2
Senior Member
Join Date: January 26, 2013
Location: Watertown, WI
Posts: 134
Which ever one has a 1:8 twist. Last time I checked, new CZ's have a twist rate of 1:9. The 1:8 twist is really needed to optimize 140 grain and up bullets, but that is just my 2 cents.
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