Start with the starting load, and work up slowly. Just like you would with any other powder. There is no magic in this game, but a lot of painstaking work. The LAST THING you want to do is take somebody else's load that may work in their rifle and blindly try it in yours. Every gun is different, work your loads up slowly. Then if prssures start to rise you can stop, and not ruin a fine old rifle, and maybe yourself. Brodie