It not only burns cleaner and softer than the regular goex it delivers more velocity for the same grains weight powder charge.
In the 40-70 44-77,44-90 st, 45-90, and some bullets in the 45-70 I use 1 1/2
In the 40-90 bn and 45-110 I use 1 f.
40-65, most bullets in the 45-70 and on occasion I use 2f in the 44-77