Rarely do ball powders shoot bullets more accurate than stick powders.
Shoot several 3- to 5-shot groups with each powder + bullet combination. Pick the powder for each bullet weight whose largest group of several is the smallest. Don't pick the powder that shot the smallest group for a bullet; that powder's biggest group for that bullet is sometimes the largest group of all.
Shoot several 3- to 5-shot groups with each powder + bullet combination. Pick the powder for each bullet weight whose largest group of several is the smallest. Don't pick the powder that shot the smallest group for a bullet; that powder's biggest group for that bullet is sometimes the largest group of all.