My Dad was a fan of IMR-4064, so that is what we used in our '06s. We used 52.0 gr with 150 gr Sierras ( a load I still use) and, I believe, 55.0 gr with 125 gr Sierras. (Please verify that, as I am not at home with my notes!)
We would jump the jackrabbit and try to get into a sitting position and wait for the jack to stop about 100-125 yards away. Nowadays, they don't seem to stop - natural selection at work, I guess.
Funny you mention your Dad being a fan of IMR-4064. My Step Dad also was a fan of that powder. In fact, he only had two rifle powders in the house ever, and one was 4064. The other was 4227 he used for his Hornet.
He used 4064 for EVERYTHING else
, chamberings from 22-250 to 257 Roberts, 25-06, 270, and 30-06.
