I am loading 110gr bullets in .38 S&W Special cases, to be propelled by 4.8 grains of Bullseye powder, using a Dillon 550b with their powder measure.
I recently read a post where OP takes now-primed, but empty case from stage #2 before powder addition; puts it on a digital scale which he zeros, and then adds the powder. Upon powder addition, he puts case back on scale -- to read actual weight of powder added.
For "kicks & giggles", I wished to load 200 of these, and tried it. While 164 dropped the precise 4.8 grains I desired, 27 dropped 4.7 gns., eight dropped 4.9 grains, and one dropped 5.0 grains.
This was an eye-opener for me, having loaded thousands in past without this step; I'd just weigh/adjust maybe first ten; then, about every 20 or so rounds, do a test dump-weigh-pour back in.
Is this the "norm"... or, might one of you learned, knowledgeable folks suggest something I may be not doing just right to cause this deviation? (I have a grounded bare copper wire through measure to A.C. ground, and have pretty much ruled out static electricity as a possible cause).
Thanks much!
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