Just a plain old trickler works just fine for this application. Balanced is balanced. Yes, I was proud of myself for coming up with that idea. My friend Ed Hellam gets the credit for the actual construction. He made two, one for each of us. At the time, I didn't have a garage to work in, and he has a small shop behind his house. Thanks Ed. Other friends have made them as well, with variations. The main thing is to have the trickler on the inside with the scale, with its handle sticking out through a closely fitted hole, so that it can be operated with the cover closed. Having a way to level the box is a good idea. Ed put a bullseye level on top of mine. One important tip. The original version had a plexiglass cover, but after I noticed that the scale read a tenth of a grain differently inside the box, I decided that it must be because the plastic was holding a static charge. When another friend built his box, armed with that information, he fitted his, and retrofitted mine with tempered plate glass, which although it make the unit heavier, and more fragile, has not posed a problem. I mostly use mine when I am helping friends work up loads for their hunting rifles with coarse powders that would not throw with sufficient accuracy. Most of my work for varmint rifles, and my PPCs is with powders that I can throw within +- .1 grain or better. Of course being able to do this has required a lot of practice, throwing and weighing with scales that read to .02 grain, and now with my tuned up 10-10. There is a lot to be learned about the finer points of throwing charges that is not immediately obvious. Different powders in the same measure require different techniques, and different measures require this as well. It is a lot more complicated than most think. The trick is to try a lot of different things, and to not pay much attention to what you have read. The one solid requirement is to have a good scale so that you can see what you are doing.
