Digital scale problems

[Martini2]

I’ve been getting excellent groups with a certain load and then the same load will open up completely shooting on a different day. Weather conditions are exactly the same. I’m thinking my digital scale is the problem. Does fluorescent lighting mess them up?

Hi Kevin. First one must ask who is manufacturer of the scale?
Perhaps it is an RCBS 1500 charge master like mine. In the manufacture's instructions it states to not let double base powders reside in scale hopper longer than necessary. The Nitro in powders attacks the Green plastic scale body. Therefore granules of powder will stick or could get mixed with next type powder. Yes older Fluorescent light fixtures may give off EMF that hampers delicate electronics. The new LED shop lights not so much. The magnets trick will not work on DC wires after the plug in transformer, they might disturb delicate electronics inside scale. Having the power outlet properly wired and grounded is required. There are little plug in checkers for that. Last use a bubble level to make sure the scale is indeed level. I don't like the little screw type feet on my Charge-master because they rotate to easily. If the whole scale unit is moved it may start rockin All in all loading with Charge Master Scale has speed up process and increased accurate weights considerably I.E. worth the sweat. M2