Powder Pan Project

DanK3Pos

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Oct 20, 2019
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I decided I could speed things up a bit if I had matching powder pans. That way, after my ChargeMaster Lite finished dropping powder, I could swap in an empty pan and it could start while I charged the cartridges.

I ordered in these powder pans (https://www.amazon.com/gp/product/B09KY7ZNM2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) from Amazon due to their sterling qualities (there were 3 of them and they were cheap). I thought because they were all made by the same company and possibly from the same lot, they would be close in weight. I was wrong. That makes sense, no reason for QC in that regard.

Initially I decide to file down one of the tabs on the heaviest pan to equal the lightest pan. Good plan in theory, but in reality, a lot of material was going to need to be removed. Maybe I should have relocated my scale to the workbench in the garage and gone to work on it with the belt sander, but I decided to take a different path.

I cut up an aluminum can, zeroed my scale to the heaviest pan, then proceeded to put my donor aluminum sheet metal in the lightest pan and trimmed and weighed and trimmed and weighed until the scale zeroed out (matching the heaviest pan). I did the same with the middle weight pan.

A savvy reader will already see the problem looming over the project at this point. How to attach the aluminum tabs to the pans? I didn't want them inside the pan, added to every powder charge. I could glue them to the bottom of the pans, but the weight of the glue would throw them off. What to do? I decided to tape the tabs to the bottom of the pans and I would add tape to the third pan of equal mass so that all three pans would weigh the same exact amount. I cut three pieces of packing tape to fit the bottom of the pans, weighed and trimmed them until all three weighed the same, then applied the tape+tabs (just tape to the heavy pan) to the bottom of the pans.

I would say the project was an unmitigated success. The pans weigh exactly the same as measured on my Creedmoor TRX-925. I've checked them multiple times now and they still match. There has been no powder accumulation under the tape. The pans are flat enough that they work fine on both the ChargeMaster and on the scale.

A friend was over a few weeks ago for a loading session. I weighed powder charges, dropping powder with a RCBS Uniflow, trickled up, then handed the powder charge off to him to charge the case while I got busy with the next powder charge. Worked great. BTW, it is definitely faster to drop powder with the Uniflow than for the ChargeMaster to do the job when working in this fashion. Working by myself, I'll let the ChargeMaster do the work.
 

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Maybe they made their scales auto zero for people like you that had two pans that were close but not exact.



Can yours not automatically start throwing charges after you replace the pan and it returns to zero?
 
Maybe they made their scales auto zero for people like you that had two pans that were close but not exact.



Can yours not automatically start throwing charges after you replace the pan and it returns to zero?

Auto zero? I'm not sure I understand. Are you asking does it auto tare? No, it tares when you hit the tare button. Does it start throwing a charge once the digital scale returns to zero? Yes. But, when the powder pans you are using don't weigh the same amount, it will not start throwing a charge with the pan that doesn't zero. That is why I equalized them. Also, perhaps you misunderstood. These pans were surprisingly not close. Not at all. If you look at the second picture, you can see the size of the aluminum tabs I added to get them equal.
 
Did you check with RCBS and see if that have the same powder pan? Heck they might even send you one
 
Did you check with RCBS and see if that have the same powder pan?

FWIW, I damaged the knife edges on my RCBS M500 when it fell off the shelf onto my loading bench. When I checked to see if it would balance, it would sometimes stick, so I dressed the edges which helped, but it would still stick a bit. My solution was to just get a new scale. I bought the same model from RCBS since I was happy with it and knew it well.

I didn't want to start over with a new pan and have the powder sticking, so I decided to use the old pan with the new scale. I couldn't even get it to level, the pan weights were that much different. I had to take the pan holder off and open it up so I could adjust the weight to compensate for using the old pan. So I wouldn't think his pans would be the same weight either.

I'm actually quite glad and sometimes impressed when people improvise in this day and age, as most people nowadays, at least the younger ones, don't seem to know how to figure things out.

chris
 
Auto zero? I'm not sure I understand. Are you asking does it auto tare? No, it tares when you hit the tare button. Does it start throwing a charge once the digital scale returns to zero? Yes. But, when the powder pans you are using don't weigh the same amount, it will not start throwing a charge with the pan that doesn't zero. That is why I equalized them. Also, perhaps you misunderstood. These pans were surprisingly not close. Not at all. If you look at the second picture, you can see the size of the aluminum tabs I added to get them equal.

My Hornady Auto Charge does the same thing the RCBS scales in jmorris's video. They will auto zero themselves as long as I stay with in 3 gr of weight difference from the one that was used for tare. I took the pan off my Hornady Auto Charge scale and tried it on my Hornady bench scale (also electronic), they look identical, but one weighs 10gr more than the other which is out of the range of the 3gr auto zero function so I can't swap pans between the two, either, without having to manually re zero the scale each time.
 
What was the difference between the heaviest and lightest pans?
I may have written it down at the time, but I don't know that I kept my notes. I started filling one tab down on the heaviest pan and it was clear that I would have to cut most (all?) of the tab off to get close to the lightest pan.
 
My Hornady Auto Charge does the same thing the RCBS scales in jmorris's video. They will auto zero themselves as long as I stay with in 3 gr of weight difference from the one that was used for tare. I took the pan off my Hornady Auto Charge scale and tried it on my Hornady bench scale (also electronic), they look identical, but one weighs 10gr more than the other which is out of the range of the 3gr auto zero function so I can't swap pans between the two, either, without having to manually re zero the scale each time.
I had no idea. I can test that. I have two identical RCBS pans. Identical in appearance, but not weight.
 
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When building engines, you weigh all the pistons and bring them DOWN to the lightest. It is very difficult to add weight but very easy to remove.
But you add heavy metal to the crankshaft to balance it, when appropriate.
 
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