Bulky Powders Are Safe Powders
Ball powders tend to be dirtier than other powders due to the detergent that covers it.
Nothing against HP38, Bullseye, and all the other really fast powders, but from a safety standpoint, I always use a bulky powder. If I accidentally double-charge a case, it will notify me by over-flowing (which is not fun on a 550, but that's another story). Unique is my goto powder for most pistol calibers.
Member: Orange Gunsite Family, NRA--Life, Varmint Hunters' Assn., ARTCA, American Legion, & South Cuyahoga Sportsmen's Assn.
Caveat Emptor: Cavery Grips from Clayton, NC. He is a ripoff