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Old April 8, 2013, 06:43 AM   #2
TMD
Senior Member
 
Join Date: August 9, 2011
Posts: 556
twist rate and bullet weight will factor more then barrel length. With that being said I haven't tried CFE on a 20" barrel but I have on my Stag Model 6H which is a 24" heavy barrel with a 1:8 twist. With 77gr Sierra bullets its a close tie between CFE and TAC. Both will shoot close to .5" groups.
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