I took the 308 out for another quick run, I was shooting prone in the snow and getting really decent results with some old 180 grain CIL Sabretips, some 165 Hornady's and 190 grain BTSP Sierra's.
I fired two of each as quick as I could, they were all in a group about the size of a Mandarin orange at 100 yds.
This was from a small Bushnell 1.5x4 scope, with these results, I think I may put something on with higher magnification and try again from a bench when the torrential rain and snows goes away.