Hi all, I have a Pietta 1873 SA revolver and I got a lot of fun shooting cartridges loaded with 26grs of 3fg swiss powder and .452 255grs boolits from a Lee mold. Is it safe to use the 4fg swiss BP with the same loads instead of the 3fg? I ask you this because the 4fg BP is faster and I don't want blowup my hands! Thank you for your help.