November 17, 2012, 08:00 PM
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#5
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Senior Member
Join Date: June 15, 2008
Location: Georgia
Posts: 10,803
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Here is what Barnes recommends as far as bullet weight and twist.
http://www.barnesbullets.com/wp-cont.../5.56-Nato.pdf
With Barnes I'd be tempted to go as light as 55 gr.
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