I use cfe blk for subs-- iirc I wasn't getting complete burn with 5744, I use h110 with supers . I'd have to check. But I think i tried 4 powders with subs before i settled on the cfk blk. I'm at 13 grains with a subsonic expanding mono (195gr) so if you go with a 5" barrel you might need a bit more for optimal mv
