Found this on another site. What ammo are you going to use? Will this be a hunting rifle? Milsurp ammo is 147 to 150 grain. Also there is a 1:11 twist as well.
308
1:8 For bullets heavier than 220gr.
1:10 For bullets up to 220 gr.
1:12 For bullets up to 170 gr.
1:14 For bullets up to 168 gr.
1:15 For bullets up to 150 gr.
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308
1:8 For bullets heavier than 220gr.
1:10 For bullets up to 220 gr.
1:12 For bullets up to 170 gr.
1:14 For bullets up to 168 gr.
1:15 For bullets up to 150 gr.
Sent from my SM-N920V using Tapatalk