The $ spent on the tool is dependent on the importance of the measurement.
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And there are diminishing returns for those dollars spent.
If I was a machinist, I would buy tools appropriate for the work I was doing. I would have a hard time justifying the money for a tool that measures to ten thousandths of an inch and was repeatable. I know they exist and I understand there are times when that type of precision and accuracy is important; I just don’t work in that world.
I have digital and mechanical scales that read to the tenth of a grain. That’s as much precision as I need for reloading tasks. Truck scales read to the pound, (and it’s probably more like to 5 or 10 pounds) and that’s close enough for that task.
Many houses have been built with steel tape measures graduated to 1/16 of an inch, and that will get the job done.
The odometer on a car reads to the tenth of a mile and I don’t think anyone needs hundredths of a mile to be displayed.
My father used Volt/Ohm meters, scientific calculators, and oscilloscopes – I was more of a test light / jumper wire, kind of guy.