will turning the necks on my brass really do much?

I am a reloading instructor and ballistics technician.

If you are chronographing your loads and have sucessfully gotten your deviation +- 3fps for 10 rounds consistantly - then maybe.

There are six things you can do to ammo that is not mentioned in any reloading manual that will make your ammo better than Lake City Match. Unless you have exhausted all of these - neck turning is going to be totally huge waste of time. Usually by the time I get these added steps accomplished - I am already getting 2-3 round inside the same hole at 200 yards. For me this is way better than what I need. Doing anything more is just anal.

Hope this helps.

I agree with Glacivew. I have reloaded 20 years and have all the stuff to trim. Done it once and have not since and reloaded the same shells 20 time or until they show unusable. I think the time it take is not worth it to me. But I am only trying to be accurate enough to kill a deer at 300 yards and my loads are.

Yes it will. It will make sure that your reloads feed and extract smoothly and reliably.