I now use a Hosford barrel wall measuring device. Bit costly I admit and takes a bit of learning how to use it, but you get consistent results that so far I have found to be highly accurate. Your measurements look about normal from a profile of wall thickness and seem to have good remaining wall thickness.
For my part I measure looking for any areas below .025 and then zero on any near .020” as the bottom end of what I am comfortable shooting. That is a personal thing. And location is everything for thin areas. 20” down the barrel is fine but within 20” I take extra time evaluating them. Guns pass proof with sub .020 thickness and are deemed in proof. They are even shot with .015-.017” thickness without fail depending on location. I just decline to shoot them.
