Hodgdon reloading data says max load for 180s is 6.2 gr of Autocomp, giving 1060 fps. I don't load 180s so can't really comment on that combination. Start load was 5.7 gr at 971 fps. The published data is for Berry's FPs, but they are functionally identical with the Xtreme RNFPsAs far as .40 goes, I have that same powder and components in stock as well as some 180 gr RNFP. Sounds like an easy starting point for .40.
As you probably know, 40 is also sensitive to setback, so be precise about COAL