For the '06 I use IMR-4064 and 168gr Hornady B-tips.

with tweaking I get under an MOA by nailing the headspace, loads of testing (hahaha) involved to see what my Weatherby liked best.

I've not had the best of luck with either of those NATO loads. Since they consume ammo I used a 5-stage press like I do for the .44 and .357 Mags. But I think the care needed for semi-autos is akin to tuning the bolt-action; and for more volume of fire without FTF/FTE I just buy commercial for 7.62 & 5.56.