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Old December 9, 2019, 07:46 PM   #5
Senior Member
Join Date: October 27, 2010
Location: Lakeland,TN
Posts: 182
I had the CMMG Sierra complete upper in 22lr and accuracy was very good-the twist on a 22lr barrel is 1/16 to stabilize the bullet better-most .223 or .556 barrels are 1/7,1/8 or 1/9 the twist is too fast for the 22lr.
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