WarmGlass.com

When I layer glass for stained glass pieces, I fill in the gaps with powder. I buy the powder rather than try to make it, usually. It works. But I wonder if there would be any advantage to using a higher size frit. Would fine or larger work better? Some criteria I would consider are:

Can a greater volume be mounded up in the gap to effect a flatter seam?
Is it cheaper?
Is the result more transparent? (I usually work transparent)
Is less heat work required to achieve flat and smooth? I would almost always prefer not to go full fuse temps and have to deal with shape change. 1425°F with a 5 min hold works ok with powder usually.

Thanks in advance.

powder tends to be self insulating because of the air between the granules.
if you have a range of sizes of grit, then they can nestle into the spaces between each other.
bigger granules will in general be clearer as trapped air can make a piece not look as clear.
However why change if what you are doing is working?