If you don't already have it, I'd recommend picking up one of the free powder manuals that Hodgdon gives out, or else visit their website. They give specific charge amounts for 777 in the 44 Sp. case. I make it a general rule to avoid posting loads on the web, just in case I screw something up while typing, but I don't mind referring you to a very good, and free, source of information. It appears that Hodgdon has kept pressures on the low end with their listed 777 loads for cartridges, about 3000 cup lower than their Pyrodex loads. There must be a reason for that, and I sure wouldn't increase my charge past what the company recommends, not in an open top, anyway.