I am looking for a powder trickler that releases one powder kernel at a time.

[MNbogboy]

VaniB pictures the Redding Trickler....Mine is located on a shelf at eye level right next to my 50 year old Bonanza scale.....Also I use a piece (approx 1 1/2" or 2") of a McDonald's clear small milk straw pushed into the threads on the trickler tube about a half inch or so...Now a person can see the powder coming as they twist the trickler....If you need one kernal you see them as they travel down the tube..Careful trickeling lets you dump one at a time...Often the powder clumps but you seem to get only two at the most and if you break the clumps with a piece of wire before they drop you can always get one.....If I drop a kernal or two over, I fish it out of the pan with a scoop made from a modified 2-1/2" roofing nail and dump it right back in the trickler....If I "scoop" out more than I wish then simply trickle in the correct amount...

I am normally only this fussy during load development during ladder and OCW tests....But it is real easy to be plus or minus 1 kernal with this method with all of my loading....

Try the clear straw you will be amazed.

BTW my old Bonanza is not magnetically dampened and that is why it is so sensitive...Often the magnetically dampened scales are not sensitive to one kernal when the pan is not moving...The non dampened scales however move when somebody opens the shop door and disturbs the air in the room....

Good shooting,
Randy

 

[BoydAllen]

The sensitivity difference that you have observed is most likely from differences in knife edges and bearings. I say this because I have tuned magnetic damped scales so that they will move (as viewed with a web cam) from one piece of Varget. Magnetic damping kicks in when the copper piece, a non magnetic conductor moves within the magnets' combined field. This produces eddy currents in the copper piece, and magnetic force in opposition to the magnets. No motion, no magnetic influence on the scale beam. A friend who has a background in precision laboratory balances, uses a scale like yours all the time. When the number of units on the up swing is the same as on the down, it is balanced.

 

[clatarar]

http://www.per-fil.com/auger-fillers/micro-dosers/


That looks interesting. A dispenser you hook up to you lab scale.

 

[BoydAllen]

With a tuned balance scale, and a web cam image on a monitor, it is easy to see a half of a tenth which works out to about two pieces of Varget. In addition to that I figured out how to drop a charge directly into a scale pan, without any powder bouncing out. Once it is there, I have little trouble finishing the charge with a manual trickler. The web cam was $35 a few years back, and I see its equivalent used, form time to time for about $5. I tuned my own scale, the latest costing me less than $40 used, and I have several old powder measures that could be made to work. One of the SAECO Micro-measures was the easiest to use for this application. With a little practice, I can do a complete cycle, from drop to drop, including a rapid drop into a funnel on a case, in about 18 seconds. Not that I do this as a matter of common practice, but I just wanted to see what could be done with a little thought and what I already had around the house. The biggest trick was figuring out how to keep the powder from bouncing out of the scale pan.

 

[brian427cobra]

I really don't see how a Prometheus would even come close to the accuracy and precision of a high end magnetic force restoration scale. Doesn't use a beam? Had anyone did a side by side comparison of the Prometheus and a GD503 or FX-120i?

I picked mine up at Brands shop, got the full tour, he has a very high dollar lab scale that lives on top of a safe filled with lead that he uses to calibrate his creation, 10 charges of Varget had a ES of .006 grains, and took less than 2 minutes, so I guess with a GD503 you could get 10 charges to a ES of.0000000000 but how long would that take, certainly more than 2 minutes per charge.

 

[M14AMU]

Me thinks I'd best not post on this!

 

[memilanuk]

That'd be a first...