I've never noticed, or even thought about, temp change with 4064, but that could be because in the 35 Whelen, loads were developed in the fall & winter & that's when the rifle was used most. Also in 30-06/150 match loads they were developed in spring/summer for spring/summer use. It works well in many cartridges, but not always the best. There are still a few pounds of it in the closet. Just in case.

Sacred cows make good burgers when you know what temperature to cook them at.-Rev. Billy