Originally Posted by Mellor
Bigger grains mean there is less surface contact for the same amount.
All salt will draw water and proteins to the surface.
I think large grained salt is better for meat, but not the reasons you said. I like to salt it, then remove the salt my brush it off before frying/grilling/BBQ etc
The entire point of Kosher salt is because the grains have more contact with the meat, which draws the water (and blood) out of the meat, this is what makes it good for koshering.
Because the grains consist of several crystals stuck together, they have a larger surface area than other types.
You have to use a lot less by weight for the same effect.
Also, brushing it off with your brush means you are also, by default, removing some of the liquids and proteins you have pulled to the surface and all it really does it limit speckling which might occur if you were cooking on a flat pan.