Also don't always expect any given bullet/powder combo to be equall in accuracy. You said it wasn't as accurate as WWB, maybe more powder will do it,maybe not. I have over 20 powders for pistol and can load each powder to the same velocity with the same bullet and have ten different groups, some high,some high and right, then low left ect.. also one may get 2" @25yrds and the next powder 8" @25 yrds. Thats why I have so many powders. My fun is seeing how good I can get any bullet to shoot. Plus I learn a lot about how the different powders act.
You MAY need a different powder to get as good as the other brand. MAY!