Had some decent luck with my 670 today. The details are....
Winchester 670 30-06. NOE 309-172-FN. Sized diameter .3095. 9 grains of WST. Winchester LR primers. Lapua brass. Wheel Weights. Emmerts lube. 100 yards. No idea on the velocity.
I'll have to get it out again to see if things repeat or if it was just a fluke. BUT at least it keeps my interest up. It was pretty calm with temps in the 40s. I'm sure some wind will make things real interesting but it's a start.