I would think neck turning is one of those things you do when you have meticulously loaded your ammo and worked up loads carefully and are looking for that extra .10 inch shrinkage in your groups. I have never done it and I have some rifles that willprints 1?2" groups at 100 yards. I suppose if I was looking to shoot out at 500 yards or so I might get anal about turning necks, but it doesn't seem to have any real world practical purpose for hunting big game at least.