Do you just grind enough for the bowl you are going to smoke, or could I grind a couple eights at once and store in medicine bottles for a few weeks of use? Id rather have it ready to go so I could just grab a pinch
and fill my pipe when i need to.

I actually grind up about an oz at a time and just store it in a tupperware container until I smoke it all. I suggest that if you are going to be doing this invest in a coffee grinder. It's all electric and trust me after awhile of grinding so much bud your wrists really going to start to hurt.

i grind up enough for a session, and take it out of the grinder as i'm ready for each bowl.

but i like looking at my buds, so i only grind them before i smoke them, no storing

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i wouldnt grind it all up at once because the other crystals might fall off after being loosened and pulled apart violently
so i usually wait till im packing the bowl to grind it

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dude, coffee grinder? thats literally powder. I do that when im cooking. a bowl would light up so fast, i couldnt do that in my bong with glass slider no screen it would just go through. sounds nuts, i think your alone on coffee grinding buds to smoke man.