I do the same. I'll try pinching the case mouth. I fill the case most of the way and tap it with my index finger of the hand in which I'm holding the case. Usually works well. Occasionally I get a little too much.Bend the case mouth into a V and you'll get more of a trickle and less of a pour. I skip the holder and just use a 7.62x54R case test tube style.
I think it's much older than that, possibly Plato.Necessity is the mother of invention. I think Mark Twain said that. Or was it Edison?
Pretend it’s gunpowder:
https://imgur.com/gallery/ORrCSYs
I though it was Aint Jean's brother in law (cousin?) Bubba when he was fixin' his flat tire with tie wraps and scraps from Lil Bubbs' wading pool...I think it's much older than that, possibly Plato.
Great little ingestion you came up with. Looks good to me.
I was expecting to see a picture of the Dipper.I just use the Lee Dipper I used to put the bulk of the powder in the pan. I select the dipper with the next lowest charge below what I want, then use the dipper like an old-fashioned salt spoon until the scale zeros.
Your device is a neat alternative to buying one, though.