Sadly it is, no matter what resolution you are able to measure it’s still not perfect.
You can have calipers that will get you close to 3 decimal places. Other indicators can get you much closer to perfect, yet so far away.
https://i664.photobucket.com/albums/...ps80ox45ci.jpg
Perfect is a never ending number of zeros though. Why we work in tolerances. Some things need to be close, some don’t matter much at all and some need to be “really” close. “Really” to a guy on a backhoe might be a number of feet, a carpenter it could be inches, a machinist, tens of thousandths of an inch. Kind of like how long a minute is depends on what side of the bathroom door your on. :)
I should have said “one” vs “you” in my statements but the reply was across the board of things posted in this thread (vs quoting each and every post or context).
This “you” falls into the “might not matter” category, in my book.
If you can load and not tell the difference between a .100 and .001, you don’t need calipers, micrometers or anything more accurate.