Nosler does make smaller 6.8 hunting bullets than 130, they have the 100 and 110 gr accubond, and I believe an 85gr E-tip or something like that, which were developed for the 6.8.
Add in the 120gr Hornady SST, which was made for hunting with the 6.8, "..."
You are correct, and I stand corrected on those. Sierra makes a 110 gameking and Hornady makes five bullets under 130 (100-120) and five 130 gr. hunting bullets, which will work at 6.8 speeds.
what sort of velocities are you getting with 8208XBR, I have had my BHW 1/8 twist 18 inch barrel for some years and have basically run 30.3 AA2520,Rem 7 1/2 benchrest primers,123 Scenar and AA brass, on average 2482, very low ES and SD numbers usually less than 10, in comparison factory Hornady 123 AMAX runs 2360.
I totally agree with going for the longer barrel lenght, I honestly wish my barrel lenght was closer to 22 to give me higher velocity. I personally think the cartridge benefits from a 20 inch barrel or greater. Thats not taking anything away from the accuracy of the rifle, it shoots lights out, have taken it past 750 with excellent results but sometimes I wish there was a hundred fps more to start with.
With regards to some other items mentioned before Dave Kiff had the chamber print for the 264lbc in 2009, Black Hills was making ammunition for Les Baer when they were selling their AA trademarked 6.5 Grendels and continued to manufacture ammuntiion for Les Baer for the 264lbc using the 123 SMK and the Amax, in all honestly the stuff although pricey shoots absoultely lights out.
With regards to c-product mags, i have a bunch they all work, those in charge of the company stand by their product 100%, and it shows in their new offerings.
For build information, I am running as mentioned above a BHW 1/8 twist 18 inch barrel with the mid lenght gas system, standard gas block, LMT stock, standard buffer, but a full auto carrier.
2700 fps from a 24" Saturn barrel, by drop calculation instead of chronograph. 31 moa to get to 1k @ 2600 ft. on an 86 deg. day. As noted, I think a 20" barrel with full length gas system should be pretty close to my 24" I don't think you get near as much 'assistance' when it comes to speed after the gas port.