It is way too fast to be a good performer in the .25-06. It might work half way ok with light bullets. The Ramshot data shows Hunter as their faster powder recommendation. If I were using Ramshot powder in the .25-06, I would definitely use Magnum. Normally in .25-06 I use H4350 or H4831. I would consider IMR 7828 too.
Big Game is one of my favorite powders in .22-250, 7-08, and 150 grain bullets in .30-06. I really get great accuracy and velocity with all three cartridges.