Is there any significant difference in accuracy in weighing each powder charge versus just setting your powder measure and thro

[Alloy4]

Is there any significant difference in accuracy in weighing each powder charge versus just setting your powder measure and throwing the charges. Also, how accurate is measuring powder by volume, versus weight. Some of the hand loaders use different size volume measures instead of weight. Is there a real difference in accuracy ?

[RES1956]

Sorry guys, I'm just anal about this. I weigh every powder charge. I know it is overkill but it is the way I learned to do it 40 years ago,,,