Thanks! Preliminary testing showed a 1" 4 shot group at 100 yards @ 2820 fps with Big Games powder. I will work off that since it should still be going 2000 fps at 400 yards. H4350 gave more speed (2920) but best group was only 1.9 @ 100 yards.

......the occasional hunter wielding a hopelessly inaccurate rifle, living by the fantastical rule that this cartridge can deliver the goods, regardless of shot placement or rifle accuracy. The correct term for this is minute of ego.