Hodgdon's recommends a load of 35 grains (910 fps) of Pyrodex P for steel .44 caliber 1858's. For Triple Se7en they recommend 20 to 25 grains (536 to 763 fps) which is the rough equivalent of 23 to 29 grains of FFFg BP.
The Pietta lawyers want to make sure you don't sue them thus the mouse fart loads listed by them. Give Cabelas a call and I bet they give you some much larger numbers than Pietta.
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