I occasionally load .25 ACP (really !) and the charge table calls for 0.8 grains of bullseye. I couldn't find a powder dipper small enough to throw that much and the Mecquon loader I use didn't come with a dipper so I made one similar to yours.

I used a .25 Auto case with a spent primer in it, soldered it to a copper wire handle and then filled it up with lead. I then used a drill bit to drill a little bit of the lead out, dipped some powder and put it on a scale. Kept drilling a little bit out and measuring what it would throw until I got it at exactly 0.8 grains.

Dan R