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Old December 28, 2019, 02:51 PM   #10
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 7,755
SAAMI tests show a 25 fps change in velocity for each inch of barrel length at 30-06 velocities.

I'd get a 1:12 twist 22" barrel for bullets up to 180 grains if best accuracy is important.
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