If your loading bench is in a dry (as in desert-like) environment, one source of erratic powder throws could be static electricity. Especially because the body of a Lee Perfect Powder Measure is made of nylon. The Lee website doesn't say what the dispensing rotor is made of, but it's back and forth rotation inside the nylon body sound like a recipe for generation of static charges. The only ways I can think of to dissipate these unwanted electrical charges are:
• Increase the humidity in the area of the reloading bench
• Provide a conductive path to ground to bleed off those unwanted static charges
• Get a powder measure with no moving parts so high up on the tribolelectric (static) series - or an all metal one.
When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. [Lord Kelvin]
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