I have an 8 pound jug of Aliant extra lite right now I'm going through as well, but there's a few cautions here. There are no published metallic loads for it that I'm aware of. Also, all Alliant powders are suspended production indefinitely, so once my jug is gone, I may not see any more. Given how scary the pressure spikes could be with it, I would not load it in any metallic cartridge.
If I could pick one powder to rule them all, it'd probably be my personal favorite: Accurate Solo 1000. Unfortunately it has been discontinued for about 11 years, so I'm hoarding the last little bit I have. Runner up would be Hodgdon Clays for CAS/WBAS. After that, Alliant Red Dot and Ramshot Competition are two others I've tried that I would load in metallic cartridges and shotgun. Winchester WST works, too.