Ramshot mag and lrt will be too slow I fear. H4350/RL16 are prime candidates if rl26 isn't your thing. I think a guy MAY be able to get enough RL23 in there to do business with, I am going to test. It's very stable similar to H4831sc but gives more speed, at an expense of a bit more fouling.@highdrum NOT a fan of RL26, toooo volatile for my liking!
Still looking for the perfect powder for 25CM? H4350 works, but it's not quite there to what is really good?!
I'v tested: SW4350, SW Long Rifle, StaBall, Hybrid 100 V.
What I'm going to test is, H4831sc, because it works so well in my 6mmCM w/110SMK, Ramshot Magnum and maybe the LRT that I have?