I neck turn all my cases now for the reason that neck turning gets rid of any burrs and uneven necks making them more uniform and thereby ensuring even neck tension on all sides of the case. I adjust the cutter to only cut +-75% of the necks. After neck turning I measure all cases with a tube micrometer and sort them in batches of say 0.010", 0.011" and 0.012". You would still find that the necks have parts where it is thinner, but at least most of it is more uniform.
I turn competition brass, but do not think it is needed on hunting ammo. If you do turn for hunting use, just barely skim the necks so that they are even all around. When you finish, the neck should look like a barber's pole.