If it's the same as Black MZ (Black MZ only comes in one pretty chunky granulation though), I have tried the Black MZ in a variety of guns. It works great in any caplock from .32 to 10 gauge shotgun. Worked best with heavier slugs. With lighter weight projectiles, it lost a lot of velocity compared to real black Wano (from Graf's). In a .58 using Minie balls, it was very close to 2f black. In a .62 flint fowler, I put 10 gr. volume black down first, followed by 50 more grains Black MZ and 1oz. shot. There was a noticeable delayed ignition. Maybe will give it another chance & see if it will light off by itself but primed with 4f black. The comparisons were based on velocities for the rifles and by dead doves for the shotgun. Used 1 to 1-1/8 oz. #7 in 10, 11 and 12 gauge with equal volume powder. Hopefully can get out tomorrow or Monday.