Tips affixed to the dispenser tube on RCBS Chargemaster 1500 to avoid excess dribbles

[RegionRat]

Aside from experimenting with the output tips and the program settings, there are two keys to getting the best out of the Chargemasters, calibration stability and the discipline to pitch the over/undercharges.

To get the calibration and stability, you have to keep the environment reasonably stable in temperature, vibration, and clear of RFI. Checking the zero drift to insure the null is stable, and also checking the gain with a check weight often enough to detect gain errors before they can affect the batch is a key.

Then, having the patients to wait for the readings to make sure they are not rejects is another key. With clumpy powders and the limits of the electronics, the operator is the only defense against accepting what should be rejected.

 

[mikecr]

There have been many independent tests concluding that the unmolested CM trends poorly to overcharging.
When these folks tested this, they input desired charge, hit dispense, on the beep they see the reading matching entered, and then they compare the charge on a better scale.
I did this same testing with mine, same results. It absolutely overcharged here & there, even while the scale still showed desired charge.

This is the reason (with mine):
Dispensing would cease when software sees desired, and with this, the scale would always display entered value from memory (desired value). But this is a dynamic situation in that the trickle tube didn't stop immediately. It coasted a bit through last jog, and sometimes additional powder fell.
My scale did not read this as it occurred, and often would never read it, unless I disturbed the pan to get a new reading. Sometimes a new reading still did not show overcharge of a kernel or two, as this was under scale accuracy. But, I learned to read my scale's response and detect it. I practiced over & over until I got good at it. Then with mods also, I no longer needed a better comparison scale.

That's me with my scale.
If it was happening the same with other folks, and they did not go through the process that I had, then its likely they were throwing overcharges just as independent testing suggested.

 

[rjtfroggy]

I have the original style CM ( made by Pact) when or if it throws charge 0.1 over I just reset for .1 lower than desired charge and run with it.
I also weigh each charge on 505 scale to confirm, I'm never in a hurry when I reload so time is not a factor.

 

[Mark W]

Mine does. So do I have some oddball generation that fixed all the gripes? I don't understand half of the issues most of you are having. I can watch mine count up the grains as it's dispensing; and if it misses, it shows on the display. Color me confused. I think it's a great unit other than being somewhat picky about the types of powder it plays well with.

I‘m also confused by some of the comments. My CM operates exactly as you described.