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Old 05-28-2005 | 09:58 PM
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Roskoe
 
Joined: Mar 2005
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From: Colorado
Default RE: .223 Rem 65 & 70 grain bullets
A 1:9 twist should do fine with bullets up through the 75 gr. A-max. I know a 1:10 is right on the edge with a 69 grain Sierra at .223 velocities - good, but barely.
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