Roskoe....Its no problem to push a round ball up to 2000 fps....The problem is you don't have the correct barrel to do so...I used to load 100-140 gr loads of fff and ff Goex in my .45 and .54 flinters...but I had 1-66 and 1-72 barells with .012 rifling...and put hornets nesting between powder and ball to prevent patch burnout...These rifles also had 42 and 38 inch barrels....I'm assuming that you are using an inline with shallow (button rifling) and shorter barrels, with probably 1-28 rifling....these rifles prefer a conical or saboted bullet...