I've dabbled with 13 grains of HS6 under a 265gr Keith. I use H110 and Unique as well. I'm loading for a custom built off of a Ruger Bisley. What are you shooting?
leads me to beleive 11 gr of hs 6 will be stout while remaining very workable pressure
Looks like there is plenty of 'room' to play with this powder with 250-255g bullets. I see loads from 9.0 to 10.8 for 'standard' .45 Colt Loads. Another manual has 11g to 12g for 'standard' .45 Colt Loads. Another place (Loads for the .45 Colt) shows 12g as 'standard' load for .45 Colt.... Linebaugh at 13g so we have 9.0 to 13g range with over 12g being Ruger Only loads....
linbaugh notes that the accuracy really tightned up at 13 gr , I guess i need to load a hundred or so rounds at 11gr and see how it does
I load a lot of .45 but usually lighter loads. I have a few boxes of HP that I plan to eventually load hotter for hunting loads but haven't got around to it yet.