Re: Turn necks w/ a Redding S FL Bushing Die for .223?
Hantra, do yourself a favor and don't get into neck turning, especially with an AR15. It is way too much effort with a yield of benefit most likely to be undetectable by even an experienced shooter in factory chambers, especially in a semi auto. Focus your time on consistent shoulder bumping, brass length, charge variance, and seating depth. But even with all this attention to detail, the most important thing to focus on is component selection.
Trust me, I have spent hours loading a handful of what I thought were perfect rounds, only to discover that they shot no better than a set of rounds I smashed together in a fraction of that time. Don't get me wrong, it is important to account for as many variables as you can, but you have to prioritize, or else you will spend days sitting in the reloading room.