I'm new here so I apologize if this question has been asked repeatedly. I have a cheap 1851 Navy and am shooting black powder. I understand that commercial powders vary in grain size (F, FF, FFF, etc) but does it really matter? The powder is crushed in the cylinder when the ball is pressed in. I would think that any grains would be crushed in the process, rendering their size moot. Smaller grains do make the powder more dense, allowing for a larger charge to be loaded into the cylinder. Otherwise, I'm not seeing how it matters. What am I missing?
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