Since you have no idea of how Swiss compares to standard black powder and have a "macho" thing about how much powder you use, know this. When doing serious load development when you care about accuracy, almost NO gun, modern or antique or replica, will be at it's most accurate at maximum or "service" load. 45g 3f Swiss is pretty much the same as 55gr 3f Scheutzen or Goex. That's 5g under "service" load. Not a max nor hardly a "powder puff".