OK
Got to shoot the first few loads this weekend. The best news of all... I didn't blow up myself or my gun. Pulling that first trigger was actualy pretty scary.

Anyway. I loaded 5 bullets of each 56.5g, 57g 57.5g and 58g IMR 4831 154g hornady bullet

Not very impressive grouping. Ranged from 1 1/8 to 2 2/8, 5 shot groups.
The funny thing was that each group was horizontally almost perfect. The groups were always strung left to right.

Another note. 3 of the 4 groups were under an inch with 1 hole outside the tight grouping obviously expanding the overall spread.

Lastly, each spread increased with the powder charge increase.