ChristosC bit more retention than I would have liked at the moment (0.2-0.3 gr)
If you can tell the difference of a cup made with 0.3g of coffee retained, you have amazing tastebuds.
Don’t forget that, prior to the single dosing revolution, it was acceptable to grind to a dose of Xg +/- 0.5g. 0.3g is just over half of that.
Honestly, just weigh in and forget about weighing out or blowing the remaining grinds out. It’s not intended to be used like that. You can, of course, but why cause more hassle for yourself? Also the retention as you say might be slightly more as the burrs wear in and also related to how oily the coffee is.
