I ended up taking a combination of the info here to make my .40 load for limited major with Alliant Green Dot powder. Here's a list of my tests all done with CCI small pistol primers, Federal brass, and 180gr coated bullet. My oal was 1.175" - 1.18".
4.2 gr averaged to 940 fps, 169.2 pf
4.3 gr averaged to 958 fps, 172.44 pf
4.4 gr averaged to 963 fps, 173.34 pf
4.6 gr averaged to 972 fps, 174.96 pf
4.8 gr averaged to 1006 fps, 181.08 pf
No signs of over pressurization on any cases. All categories of weight were done in sets of 5.
I settled on 4.3 grains to stay on the safe side for in case of slight light charges and/or wonky chronos at majors.
Hope this helps anyone out there with a random lb of green dot to shoot up!