I don't do light unless I am fire lapping
. I don't do 'heavy' often either. My .44 Magnum loads are under 1100fps. My .45 Colt loads are under 1000fps, except for my woods load which is around 1100fps. Currently my general load for .44 Magnum is using 10gr of Unique under 240gr SWC (8.5gr will duplicate the .44 Special Skeeter Load). My .45 Colt is using 7.0gr Green Dot under a 250gr RNFP. Unique works well for .45 Colt too. That said, I've tested a lot of powders. I would have no problem using BE-86, Universal, Unique, True Blue, HS-6, Herco, 4227, 20/28, Green Dot, Red Dot, W-231, Power Pistol, AA #5, CFE Pistol, and Long Shot to name a few. Found good loads for each of these. If had to change to another powder, I'd go with True Blue, then Power Pistol, I think. Anyway, YMMV.