If you have some, Ramshot Big Game was the best powder tried in my .17 Remington when I owned it. Ramshot doesn't have any data listed but I dared the elements and tried it anyway. I ran 28.0 grains with 20's and 26.5 with 25's.
Benchmark was second-best with 20's, and Varget with 25's, using Hodgdon data.
