Thndchicken hit the nail on the head. Consistancy is by far the most critical procedure in accurate reloading. Neck turning is worthless and a waste of time on a factory chamber. Some can argue it's a waste of time on a custom chamber too and I have 2 of them with tight necks. The next best thing is confidnece. Be confident in yourself. Be confident you have done everything tothe best of your ablitly, be confident in your shot. If you think that weighing cases, bullets and primers helps, then you should do it because it adds confidence. If you think turning necks on a factory chamber adds to accuracy then do it, once again for the confidence.