Bullseye is perfectly fine to use in 9x19mm and 44 Special, so long as you are not looking for maximum possible velocity from these calibers. Be careful to not double charge a case, it does not take a whole lot of Bullseye to reach maximum safe pressures.
Again, be careful not to exceed loading data when using Bullseye. I used to use it as a pistol powder. As I recall, it is not all that clean burning, and is dirty, but I may be thinking of something else