Keep going with this Muley... Need to know what gun and generally what weight projectile...

rodwha

Most but not all ML's have a max load of 150 grains of real BP or Pyrodex. If you are using T7-2f you should reduce the the 150 grains by about 15% or if you are using T7-3f reduction is around 25%. Hodgdon recommendations are a bit high as I have found. More like 10% with 2f and 15% with 3f, but it is always better to be safe than sorry...