What bullet do you want to shoot? 8208 is your friend with the 6x6.8 across a range of bullets. 29.0 gr 8208 and an 87 gr vmax should net around 3000 fps. I never ended up working up a load for 58 grain pills before losing my job and selling my rifle. I'll build one again for sure 22" standard would be my choice.
After 29 the groups tightened up but its reaching max load so work up slowly.
I shoot an 18" 6x6.8 and have settled on an 85gr partition load for my hunting needs.
I have found that 26.3gr of H4895 seated to 2.280 shoots just below MOA at 2,750fps (probably better, I shot from the prone off of my pack). I think it is a touch slow and could be hotter, but I have not had the time to test further.
28.0gr 8208 produced velocities a little above 2900fps, again loaded at 2.280, but I was not shooting for pinpoint accuracy, just a servicable hunting round.
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