Unique powder for 40s&w

[Purebreedcolt]

Ok I am finding a .7 spread in max load. I am tring to load 180 grn gold dots. First time useing unique with my 40 as i have been useing winchester 231 but wanted to try out unique because if it is like other rounds I can get a little more speed but stay well with in safe pressures. can some one please help
thanks
PS dont want to load to max just want to know what max is