I swage 451s on a Corbin press. I never went further because it is so dang expensive for dies. It is a very interesting hobby and even a beginner can make Match grade bullets easily.
Your 9mm rn and 357 would both take only two strokes to make, but you wont be able to use the same dies.
I've been saving 22LR brass while saving for the dies to make 224s from them and then the doubled the cost of the dies.