Re: 6.5/06AI Barrel Length
I've had several 6.5-06AI and here is barrel Length and Velocity:
25.5" Pac-nor 3 groove-3080 with 140 VLD (pretty fast barrel)
26.5" Pac-nor 5 groove-3070 with 140 VLD (I had this barrel shooting up at 3160 but it was pretty hard on brass but shot very well)
26" Broughton-3070 with 140 VLD
27" Pac-nor 3 groove 3105 with 140 VLD
All the rifles I have had shot .5 moa or less out to 800 yards. All were loaded with Lapua brass Fed 215M primers, 59 grains of Retumbo behind a 140 JLK. Brass life was very good, I wasn't leaning on it very much.
Don't be afraid to look at the Brux barrels. I have two of them on 6.5x47 Lapua's and probably now will go with Brux on all my future builds.