That gauge can certainly be used to relative and effective precision, and it is sure better than ignorance and other guesses. Damn the naysayers, full speed ahead. AND you damn sure shouldn't take grief for asking questions...
Thanks - have no time for the naysayers and people who criticize folks who ask questions. Let them sit in their little bubbles of self involvement and self pleasure...
As you said, this device is fine for what I need, I just need to use it to get the best results I can.
So to answer your question... it does take some time and effort to get a good feel for it. I believe it definitely should be worked vertically. I assume most of the fine details are in the thread posted above... I did not go look, but I read several threads here through out the years. In my experience, it does require a firm but fluid touch/ motion and a gentle up and down and back and forth. That should at least present repeatable numbers and a general feel for the general geography of the barrel. I always check top, bottom and outside of each barrel, and then worked larger degrees when thinnest areas or areas of concern showed. In getting the feel, I would personally find it tought measure at exactly one spot..... if that makes sense? As in my motion or the set up may not fit exaclty every inch or some other target.... but I could get a good read on a spot right near an inch -being more focused on the feel and the measurement than hitting an exact spot.
Thanks. I like the idea of using it vertically....and I really appreciate the walk though on how to use it.