From the Acurra Manual PDF:
..BLACKPOWDER SUBSTITUTES- Safer and cleaner-burning
substitutes for blackpowder have been developed and these are perfectly
suitable for your CVA muzzleloader. Some of the popular brands are
Hodgdon Powder Company’s Pyrodex™, Triple Seven™ and White
Hots™, American Pioneer Powder™, and BlackHorn 209™. Some of
these are available in both granular and pelletized form. An important
thing to remember is that individual rifles will perform differently with
the same powder and bullet combinations. Each of the blackpowder
substitutes have their own characteristics and CVA recommends that
5
you try several powder and bullet combinations to see which one gives
you the performance you are looking for. New blackpowder substitutes
may be introduced after this manual is written.