fffg triple 7 i was using today. I have no clue how much of a difference there is. FFG and fffg triple 7 all shoot the same in both of the rifles i have sighted in. Pyrodex p made a huge difference with my flintlock and im now able to shoot constant groups. When using triple 7, first shot would be dead on, next 3 or 4 shots would be 10 to 11" low. It was doing the same thing in my x-150 and thats when i started swabbing between shots to keep the groups the same.