A few days ago when the weather was delightful I had intended to take my unfired Pedersoli Philadelphia Derringer (percussion) to the range for its first shots. I checked my downloaded Pedersoli SUGGESTED BLACK POWDER LOADS Acrobat file - nothing listed for this derringer or their screw barrel box lock Liège Derringer. I emailed Pedersoli for load data.
Pedersoli's load recommendation is: .451" round ball with .010" patch, 9 grs. of FFFFg
While my experience with Pedersoli's recommended loads for their Kodiak Safari is that loads are extremely modest, this derringer recommendation seems unusually modest.
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Their Philadelphia Derringer is about one-half the weight of the common Jukar derringer, nearly identical in size to original Henry Deringer pistol used to murder Lincoln - but .45-caliber rather than .41-caliber. Quality of assembly and fit is excellent.
Those who have experience with this derringer, or comparably small Italian-made derringers, such as Palmetto of the turn of the millenium, please furnish safe, but less modest loading data.
I request data because I had intended loading with 15-20 grains Goex FFFg with .451-inch RB before it began snowing again. Now I'm unsure what to load.