It can be done to some extent.
If you color the neck with a sharpie you can adjust your die until it just gets fown to where the neck and shoulder meet? I have done it with some worn chambers to help extend brass life on my Enfield and T99
If your going to get into neck sizing buy the...
My middle school back in the 80s was built with steel reinforced interior doors , small wire mess window and a large paddle interior side to lock the door. I vividly remember a “janitor” that would go around and make sure all the exterior doors where closed.
Nothing out there cheaper that I can find
Heck try finding the lapua 167s for less than .45 each or lapua brass for less than $135/100
Now I reload so spending $1.50/rd to run in a 3 moa rifle is a bit of a waste BUT if you dont reload its one if the cheapest 30-06 available right now that...
Im glad to see your not super OCD , a quick clean and ready to load !
Oh and that seating die mark , yeah no its a fragmenting ring !
It may not look great but that ring wont do shit to the end result.
Nice now go shooting , while others are prepping brass, lol