yes, not unlike what I do for pistol ammo on a progressive.Thank for the call out. I'll offer what I can here.
First off I don't run automated presses. I pull the lever every time for every round I make. If something doesn't feel or look right I stop and figure out why.
Second In the progressive presses I only use ball powders and case activated powder drops. The ball powders meter extremity well so I trust but verify the powder drops I'm getting. Once I'm sure I randomly check thru out the production run but no more than every 100 rounds. I don't want to have to pull a whole Lot of ammo so if there is an issue it will be in the last 100 rounds I made. I pull the last 100 and fix the problem then start all over again.
I do use a RCBS digital scale and re-calibrate it every morning. I used to double check it with a RCBS manual scale but over time have found that to not be needed.
The above is for straight wall pistol cartridges and that is all I load commercially.
My own personal rifle cartridges are loaded on a Rock-Chucker, and I hand weigh every charge to the exact amount. It might take me all day to load 100 rounds.
Because of the low volume/weight of powder in pistol loads, I throw 10 charges to check and verify weight.
Of course, I set my scale at 10x the target weight for weighing those 10 charges.
My powder drops thru the expander die, so I have made some looong cases to be hand held against the expander to throw those 10 charges into.
And yes, I maintain contact with the expander throughout its upward travel with the powder measure.
38sp and 9mm
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