The best source for answers regarding your specific powders would be to manufacturer's website. There are a number of great loads and powders available for the 175gr cast. If you don't already have it, a great reference book is the Lyman Cast Bullet Manual #4. It lists quite a few. I have never loaded either of these powders, but have heard good things about WST, WW-231, Red Dot, Unique, Power Pistol, and a number of others. Because of it's bulk and low energy, I would be kind of surprised if TrailBoss worked very well in the .40s&w.
Are these bullets you cast yourself or did you buy some commercial cast ones? Do you know how hard they are?