I've been working up loads with blue dot, HS6, HS7 and cast, aside from what I think is quite a lot of smoke, they're working pretty well at this stage. still some refinement to do though.
red dot works great for light bullets and light loads though. works absolutely great for 125-148 grainers loaded to 38sp levels
I'd bet that green dot would make some nice medium loads with something in the 150 grain area. 180 might be a bit heavy I think.