Black powder volumetric doser
thingiverse
This avoid putting black powder everywhere and have to manipulate carefully with hand. You just have to push the slide and release it to drop approx 1g of black powder. This thing is intended to work with tinny plastic vial with a 12mm diameter. You'll need 11 M4 screws, 4 spring to keep a gentle tension beetwin the funnel and slide and one (or more) ruber band.
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