Re: Neck Turning Advice
From what I have seen the general consensus is no, if you don't have a tight necked chamber then neck turning will not help enough to be worth it. There may be some benefit to just evening out the neck thickness on 75% or so. Neck turning helps to create even neck thickness, even chamber clearance, and even release of the bullet; with a loose factory chamber though there are simply to many other things going on to see the full benefits.
Many like the Hornady neck turner, and a lot of people like the Sinclair tools. The RCBS version has gotten mixed reviews.
I do not neck turn yet, but I have been looking at getting into neck turning as well, and have done a lot of research on it lately. I still plan to try it just to prove it to myself, but it's looking like the gains will be minimal.
Owner of & Chief Instructor for The Southern Marksman, LLC
NRA Life Member, NRA CRSO, Multi-Discipline NRA Certified Instructor