Neck sizing versus FL sizing. It will never be put to rest. Some rifles shoot better one way over the other. I have found in a 5 of my rifles FL sizing wins everytime. It takes time and patiance to do,but load development is as fun as shooting to me. You just need to do your own tests and see what your rifle likes. Brass lasts longer neck sized only?. 6 of one half dozen of the other on that story also. Brass is still cheap enough that you really don't need to worry about it. I get 12 reloads out of my 308's, 17 reloads out of my 6MMBR, 14 reloads in 243, Around 8 in 223 and about 10 in the 22-250. I don't know if brass is shot by then,but like i say,, It is to cheap to take any chances after that. Those are just where i stop to be safe.
NRA Certified RSO
NwCP- Performance Isn't Optional